First, I'd like to emphasize that both characters are very limited in what they can do against generic enemies. Both:

-Have only 2 chapters of availability

-Are limited to 5-6 move

-Have transform issues

-Are restricted to 1 range

-Have trouble 1RKOing

(You'll see why this is important later in my post)

Let's quickly compare their bases, assuming Nasir gets a 2 level BEXP dump while Ena gets 3.

Nasir lv 20: 58 hp, 41 atk, 26 spd, 30 def, 32.5 res

Ena lv 13: 55 hp, 36 atk, 21 spd, 28 def, 27 res

2x Tiger lv 11-12 (claw)

46 hp, 31 atk, 17 AS, 129 hit, 37 avo, 20 def, 9 res, 9 crit, 3 cev

Both 2RKO

8x Raven lv 11-12 (beak)

39 hp, 22 atk, 21 AS, 127 hit, 45 avo, 14 def, 10 res, 8 crit, 3 cev

Nasir will only double if he's transformed without the demi-band. If that's the case, then both 2RKO once again.

1x Warrior lv 12 (steel bow, steel axe)

49 hp, 30 atk, 16 AS, 106 hit, 40 avo, 14 def, 8 res, 7 crit, 8 cev

Nasir has a slight edge here, particularly if Ena doesn't double.

Also keep in mind that while Nasir's level is maxed out, Ena is levelling fairly quickly through CEXP (eg/ the warrior gives roughly 10 exp / hit and 25 / kill), so she'll simply be catching up over time. The same is true if we choose to BEXP her more, which is a distinct possibility since all your primary units should be fully developed already.

Case in point: Nasir undoubtedly wins vs generics, but that lead is mitigated by how little combat exposure either unit is getting as well as how swiftly she can catch up to him statistically.

This leads me to my main point: When considering the Ashnard fight, Ena serves as a much better crutch than Nasir.

See, if we unlocked Nasir, that means Ike was RNG blessed, so he'll be fine to take out Ashnard with resolve (and wrath if it's still available). However, if we unlocked Ena, then no such condition has to be met. Thus if Ike was RNG screwed enough, putting resolve + possibly wrath on her instead will decrease the turn count of the final chapter dramatically.

-Have only 2 chapters of availability

-Are limited to 5-6 move

-Have transform issues

-Are restricted to 1 range

-Have trouble 1RKOing

(You'll see why this is important later in my post)

Let's quickly compare their bases, assuming Nasir gets a 2 level BEXP dump while Ena gets 3.

Nasir lv 20: 58 hp, 41 atk, 26 spd, 30 def, 32.5 res

Ena lv 13: 55 hp, 36 atk, 21 spd, 28 def, 27 res

2x Tiger lv 11-12 (claw)

46 hp, 31 atk, 17 AS, 129 hit, 37 avo, 20 def, 9 res, 9 crit, 3 cev

Both 2RKO

8x Raven lv 11-12 (beak)

39 hp, 22 atk, 21 AS, 127 hit, 45 avo, 14 def, 10 res, 8 crit, 3 cev

Nasir will only double if he's transformed without the demi-band. If that's the case, then both 2RKO once again.

1x Warrior lv 12 (steel bow, steel axe)

49 hp, 30 atk, 16 AS, 106 hit, 40 avo, 14 def, 8 res, 7 crit, 8 cev

Nasir has a slight edge here, particularly if Ena doesn't double.

Also keep in mind that while Nasir's level is maxed out, Ena is levelling fairly quickly through CEXP (eg/ the warrior gives roughly 10 exp / hit and 25 / kill), so she'll simply be catching up over time. The same is true if we choose to BEXP her more, which is a distinct possibility since all your primary units should be fully developed already.

Case in point: Nasir undoubtedly wins vs generics, but that lead is mitigated by how little combat exposure either unit is getting as well as how swiftly she can catch up to him statistically.

This leads me to my main point: When considering the Ashnard fight, Ena serves as a much better crutch than Nasir.

See, if we unlocked Nasir, that means Ike was RNG blessed, so he'll be fine to take out Ashnard with resolve (and wrath if it's still available). However, if we unlocked Ena, then no such condition has to be met. Thus if Ike was RNG screwed enough, putting resolve + possibly wrath on her instead will decrease the turn count of the final chapter dramatically.