Should I +10 her on 4 star or first make her 5 star and slowly make my way to +10 there what is the better option or does 5 star make her just SOOO much better than 4?
A 5* +10 unit is better than a 4* +10 unit, but if you're gonna +10 her anyway, then you might as well make her 5*.
I only 5* +10 units I really like from their old games (if only Cormag was here, just got him in Sacred Stones, xD).
Since I can't get one more Donnel, I might start merging my Felicia, or maybe make a Bartre.
I would work on merging Nino into a 5*+10. A long time ago I did a 4*+10, and now regret it. For one, I’m never going to invest the 20,000 feathers into another to give Nino Gronnblade+ so for me, she just sits in my barracks doing nothing. Guess I could at lest get 3,000 feathers for her but still
I have a 4 star+10 Nino. The 5 star version has 2 more points of everything(except def with has 3 more) when at +10. If you want a top tier green mage threat with her optimal power, and possible Arena Core(not as likely, given Mages score lower) save up and 5 star max her. If you just want a strong green mage, and you aren't as concerned about score. 4*+10 is very powerful, too.
Well do you have any 5*+10? Sheena is best common green for arena points. Also i love my maxed Soren for the utility, als great arena unit! I use a 4*+10 Nino in AA with Ephraim and its just fine, she still kills everything! With fury and all the buffing he gets +2 all isnt huge.
That's mostly dependent on you. Having a 5* +10 Nino can really help, but if you don't want to go through the amount of resources it takes to do that, then a 4* +10 Nino is also really helpful.
Many people only 5* +10 units they really like (like me) so MY advice to you would be...
If you really like her, then 5* +10 her. If you don't actually like "her" as a character, then 4* +10 is perfectly fine.
Pokemon GO
Fire Emblem Heroes
Fate Grand Order
Dragonball Legends
Dragalia Lost
IV Calc
Heroes