Before they meet, Nephenee has 2-1, 2-2, and 2-E while Shinon has 3-P and 3-1.
Neph's 21 AS doubles everything in 2-1 without exception. 31 atk ORKOs most things, leaving armors and bandits where's she's still doing better than Brom anyway. Being the only fighter aside from Brom and lolHeather, this is pretty important.
If Neph is able to get a level and get Spd or Str (~77%), her new 22 AS will be able to double the 18 AS Halberdiers in 2-2 (although 31 atk doesn't quite ORKO them, no one else does better). Crit aside, her combat, whether 1 or 2 range, is better than Lucia's and she loses durability. Given this chapter's 7 turn limit for max BEXP and Nephenee's good offense, she's still quite a big help here.
2-E is not as good for her but is not bad either. She can't really be an effective wall, so she'll mostly be restricted to raining Javelins down on people or clearing out enemies before someone else like Mordecai or Haar jumps in front to take most of the enemies.
(I'll be assuming Shinon (T) for the comparisons). No doubt about it, Shinon is pretty good in 3-P and 3-1. 26 AS doubles everything aside from a few SM's, and Bows means he doesn't take counters. But Bows also means he's mainly locked to Player phase. 31 atk with a Steel Bow only ORKOs Sages, so he's otherwise left with 29 atk and 55 crit (~40 after Luck) to ORKO. 29 atk at least 4HKOs everything that's not a General, so that's still good. But, only on player phase on a team where we have Ike, Titania, Gatrie, Mia, Oscar, and Boyd who can do stuff on enemy phase. As a result, I'd have to give Nephenee the pre 3-2 win for helping the team more overall.
Then 3-2 comes and we can start comparing them directly. I'll say level 7 Nephenee and 14 Shinon w/BEXP (so his level mostly guaranteed HP, Str, and Def). It's hard to say who's really better at this point. Shinon wins player phase due to +3 Str and a possible +atk support (Neph doubles a 23 AS SM, otherwise both double the same things) while Nephenee wins enemy phase due to being able to actually do stuff there, although her durability is a bit limited (The stronger guys can 2HKO her, average guys are more like 3HKO. She has ~73 avoid also, so she sees an average of 40-50 displayed Hit).
However, Nephenee grows a lot faster. She likely already has Spd capped and will likely cap Skl in another level. From there she can BEXP (possibly in the 3-3 base) for HP, Luck, Res, capping Res and then Str/Def all the way (Kinda like giving her 50% in both growths as long as lolMag doesn't proc at 15%). Shinon can do the same thing for Str, Def, Luck, until Def caps and then start getting Res (He can cap Res by 19 if he only slowplays). However, this does not help Shinon's 1 range deficit, while Nephenee is getting conituously stronger and more durable, even if she misses out on a couple BEXP levels.
Shinon will likely spend a bit more time in tier 3, but by the time Neph reaches it (probably a chapter or two later) she'll start cleanly beating him, since she'll be durable enough to take on plenty of enemies and her offense will be a lot better as well due to have a Skl% mastery instead of Skl/2%. Shinon will still have more Str (+2 tier 2 cap as well as more likely to reach it, but -1 promo bonus) but there won't be much, if anything, that he can ORKO that Nephenee can't. And for the stuff neither ORKOs, like Generals, Nephenee has 28% mastery while Shinon only has 16%, hers grows faster, and she has enemy phase to have more chances of activating it.
When it comes to Endgame, Shinon wins as long as he has the Double Bow, and it's kind of tied when Neph gets the Wishblade. Shinon will win overall due to always having more Str and 1-3 range, but the win isn't large since Neph's performance is still good and 4-E doesn't hold that much weight.
The real difference between Nephenee (N) and Nephenee (T) is that (T) doesn't have the slow start that (N) does. The start is still a bit slow, but much better and it doesn't take nearly as long to get out of the offensive and defensive holes which makes her able to pull ahead of others a lot faster. Shinon (N) vs. Shinon (T) is just better BEXPing for some more Str, since the initial Spd boost only helps on a few enemies.
I realize the majority of this post is just generalizing most of the areas of the game, but I kinda wanted to get a discussion going here and this looked like a good place to start.
Neph's 21 AS doubles everything in 2-1 without exception. 31 atk ORKOs most things, leaving armors and bandits where's she's still doing better than Brom anyway. Being the only fighter aside from Brom and lolHeather, this is pretty important.
If Neph is able to get a level and get Spd or Str (~77%), her new 22 AS will be able to double the 18 AS Halberdiers in 2-2 (although 31 atk doesn't quite ORKO them, no one else does better). Crit aside, her combat, whether 1 or 2 range, is better than Lucia's and she loses durability. Given this chapter's 7 turn limit for max BEXP and Nephenee's good offense, she's still quite a big help here.
2-E is not as good for her but is not bad either. She can't really be an effective wall, so she'll mostly be restricted to raining Javelins down on people or clearing out enemies before someone else like Mordecai or Haar jumps in front to take most of the enemies.
(I'll be assuming Shinon (T) for the comparisons). No doubt about it, Shinon is pretty good in 3-P and 3-1. 26 AS doubles everything aside from a few SM's, and Bows means he doesn't take counters. But Bows also means he's mainly locked to Player phase. 31 atk with a Steel Bow only ORKOs Sages, so he's otherwise left with 29 atk and 55 crit (~40 after Luck) to ORKO. 29 atk at least 4HKOs everything that's not a General, so that's still good. But, only on player phase on a team where we have Ike, Titania, Gatrie, Mia, Oscar, and Boyd who can do stuff on enemy phase. As a result, I'd have to give Nephenee the pre 3-2 win for helping the team more overall.
Then 3-2 comes and we can start comparing them directly. I'll say level 7 Nephenee and 14 Shinon w/BEXP (so his level mostly guaranteed HP, Str, and Def). It's hard to say who's really better at this point. Shinon wins player phase due to +3 Str and a possible +atk support (Neph doubles a 23 AS SM, otherwise both double the same things) while Nephenee wins enemy phase due to being able to actually do stuff there, although her durability is a bit limited (The stronger guys can 2HKO her, average guys are more like 3HKO. She has ~73 avoid also, so she sees an average of 40-50 displayed Hit).
However, Nephenee grows a lot faster. She likely already has Spd capped and will likely cap Skl in another level. From there she can BEXP (possibly in the 3-3 base) for HP, Luck, Res, capping Res and then Str/Def all the way (Kinda like giving her 50% in both growths as long as lolMag doesn't proc at 15%). Shinon can do the same thing for Str, Def, Luck, until Def caps and then start getting Res (He can cap Res by 19 if he only slowplays). However, this does not help Shinon's 1 range deficit, while Nephenee is getting conituously stronger and more durable, even if she misses out on a couple BEXP levels.
Shinon will likely spend a bit more time in tier 3, but by the time Neph reaches it (probably a chapter or two later) she'll start cleanly beating him, since she'll be durable enough to take on plenty of enemies and her offense will be a lot better as well due to have a Skl% mastery instead of Skl/2%. Shinon will still have more Str (+2 tier 2 cap as well as more likely to reach it, but -1 promo bonus) but there won't be much, if anything, that he can ORKO that Nephenee can't. And for the stuff neither ORKOs, like Generals, Nephenee has 28% mastery while Shinon only has 16%, hers grows faster, and she has enemy phase to have more chances of activating it.
When it comes to Endgame, Shinon wins as long as he has the Double Bow, and it's kind of tied when Neph gets the Wishblade. Shinon will win overall due to always having more Str and 1-3 range, but the win isn't large since Neph's performance is still good and 4-E doesn't hold that much weight.
The real difference between Nephenee (N) and Nephenee (T) is that (T) doesn't have the slow start that (N) does. The start is still a bit slow, but much better and it doesn't take nearly as long to get out of the offensive and defensive holes which makes her able to pull ahead of others a lot faster. Shinon (N) vs. Shinon (T) is just better BEXPing for some more Str, since the initial Spd boost only helps on a few enemies.
I realize the majority of this post is just generalizing most of the areas of the game, but I kinda wanted to get a discussion going here and this looked like a good place to start.