being forced to play as other characters is garbage (SPOILERS)

[Banim]

I don't think I had trouble with that specific encounter by just fighting the boss instead of kiting, IIRC Hien does have some self-sustain, so you either didn't use it enough or weren't dodging the dodgeable things enough. The small number of skills is not very thrilling but I assume it's to avoid overwhelming players by suddenly dropping a full kit on them. Gameplay-wise these are hit or miss with people but I personally like having these fights from a story point of view.

[Djuntul]

i did dodge everything. what killed me was his aoe blast that knocks you back aka unavoidable dmg. and the self heal only does 10k (with around 60k health) and is on a 2 minute cd

[Frizze]

I don't think I had trouble with that specific encounter by just fighting the boss instead of kiting, IIRC Hien does have some self-sustain, so you either didn't use it enough or weren't dodging the dodgeable things enough.

He has a little, but what youre actually supposed to do is stick close to your friends Lyse and Yugiri. Lyse regularly does a friendly(blue highlight) aoe that reduces the damage you take, gives you regen, and i think increases the damage you do. That plus normal dodging is all you need to wait out the timer for phase 2 of the fight to start.