This is my argument from SF:
For the record, 'B' Aran by 1-6 is incredibly unlikely, so the comparison in 1-6 is even more favourable to Jill as Nolan has less of an avo lead (if he still has one at all).
Thoughts?
Jill (T) into high tier.
Let's compare her to Nolan when she first joins. Giving Nolan a level per chapter and 'B' Aran (Likely?) gets him these stats:
Level 14 Nolan with an iron axe forge, 'B' Aran: 32 HP, 27 Atk, 13 AS, 56 Avo, 12 Def, 6 Res
Level 14 Jill with an iron axe forge: 24 HP, 26 Atk, 17 AS, 48 Avo, 13 Def, 3 Res
Right off the bat, Jill has an offensive lead over Nolan. The latter doubles 3 enemies but only has a HKO lead on the armour (though RKO is the same). The former only fails to double 4 enemies - two of which aren't doubled even by the top tier Volug. Oh yeah, and Jill has flight + mov lead + canto over Nolan to reach enemies. The pegasus will be hard to reach for Nolan, I'm sure.
Of course, there's durability right? Yeah, Nolan has an 8 HP, 8 avo and 3 res lead against Jill's lone def, so that's a win. But there's the seraph robe you get in 1-4. With that, it's pretty close (1 HP + 8 avo + 3 res vs 1 def), and considering Jill's offensive and mobility leads, Jill(T) has teh advantage at this point i'd say.
Come endgame:
Level 18 Nolan with a steel axe forge, 'B' Zihark: 34 HP, 32 Atk, 15 AS, 72 Avo, 12 Def, 7 Res
Level 17 Jill with a steel axe forge, 'C' Volug + Robe: 32.5 HP, 30 Atk, 19 AS, 64 Avo, 15 Def, 5 Res
Durably, it's 1.5 HP + 8 avo + 2 Res vs 3 Def. Pretty close, but I'd say Jill wins it, as after a hit each, Jill's leading HP by 1.5 points, unless it's res, but mages aren't incredibly common anyway. Considering it took a robe, let's call it a tie, however. What's not a tier, though, is there offensive capabilities. Do you know how many enemies 15 AS doubles? 1. The meteor mage at the back that even base Micaiah can double. I looked through the enemy list and there's only 1 enemy Nolan has a RKO lead against - Jarod. Nolan 3RKO's, Jill 4RKO's. But noone cares anyway as we'd rather have Nailah or the BK do it in just 1 turn.
Oh, and Jill can fly up ledges without a penalty, and still has canto, so she still has superier mobility than Nolan.
Part 3 comes along swiftly...
Level 20/1 Nolan with Tarvos 'B' Zihark: 38 HP, 36 Atk, 18 AS, 80 Avo, 18 Def, 9 Res
Level 20/1 Jill with a steel axe forge, 'B' Volug + Robe: 36 HP, 34 Atk, 21 AS, 80 Avo, 18 Def, 9 Res
19x Tiger lvl 16: HP 50-52, Atk 39, AS 16, Hit 137, Avo 39, DEF 20
8x Cat lvl 15: HP 42, Atk 27, AS 20, Hit 137, Avo 47, DEF 14
7x Cat lvl 17: HP 43, Atk 31, AS 22, Hit 142, Avo 52, DEF 16
Durably, i'd say it's a tie. Nolan's HP gives him the advantage against a few enemies (such as the level 15 cats), but Jill's AS means she isn't doubled by some of the cats. As for offence, well, look at the stats yourselves, folks, Nolan 4RKO's the level 16 Tigers, Jill 2RKO's them. (Nolan 3RKO's with teh brave axe). Jill 3RKO's the level 15 cats, Nolan 2RKO's them (Both 2RKO with the barve axe). Both 3RKO the level 17 cats (both 2RKO with teh brave axe). So Jill has an advantage offensively against the most common enemy on the map. This, along with flight utility makes her the superier in this map too.
Skip along to part 4...
Level 20/12 Jill with a forged silver axe, 'A' Volug + Robe: 41.5 HP, 42 Atk, 25 AS, 104 Avo, 23 Def, 14 Res
Level 20/12 Nolan with Tarvos, 'A' Zihark: 44 HP, 41 Atk, 24 AS, 113 Avo, 22 Def, 12 Res
Say Jill went to 4-P and Nolan to 4-1. Jill doubles ~17 enemies, on average. But in 4-1, Nolan only doubles 4 enemies. You can see the difference. Even in 4-P, Nolan would only double 4 enemies, so please, nothing like "You're favouring Jill by letting her go to pally fest", especially since the desert is after 4-P, and Jill can most certainly go there as it's where she's at her best (probably). In fact, I'd say I'm favouring Nolan, as I'm giving him authority stars to help his avoid. With them, even the 4-1 crossbow user has <50% hit on him. aka, it's very good. Jill's facing 40-60% hit rates mostly, while Nolan faces 20-40%, quite a difference. So Nolan's better durably and Jill's better offensively. But Jill isn't a glass cannon (36 Atk, which is about average for 4-P, 4RKO's her), and Nolan isn't exactly weak. So overall, I'd say they tie.
Come endgame:
Level 20/20/6 Jill with a forged silver axe, 'A' Volug + Robe: 52 HP, 50 Atk, 30 AS, 136.5 Avo, 30 Def, 22 Res
Level 20/20/6 Nolan with Tarvos, 'A' Zihark: 56 HP, 49 Atk, 32 AS, 152 Avo, 28 Def, 19 Res
Nolan doubles 7 more enemies with that AS lead of his, which is pretty good. Jill's Atk, avo and HP can all be a bit higher than what's shown here with bexp, however, especially as she caps speed early in tier two. Nolan's mostly 3-5RKO'ed, whilst Jill's 4-6RKO'ed. Both are pretty untouchable, though. So yeah, Nolan finally wins.
Well, he does... until we hit dragons when they're both the same when it comes to doubling, but Jill being slightly more durable and then by the time we get spirits, it's pretty much tie game for the pair.
So overall, there two units are incredibly close, but with Jill winning pre part 4. Nolan's pre 1-6 game shouldn't warrant a tier gap, as it didn't in the case of Zihark. So I propose moving Jill(T) to the bottom of high.
For the record, 'B' Aran by 1-6 is incredibly unlikely, so the comparison in 1-6 is even more favourable to Jill as Nolan has less of an avo lead (if he still has one at all).
Thoughts?