Sorry if this comp isn’t accessible to some people due to these adventurers/dragons being gala/limited.
I believe that veronica and gala mascula are irreplaceable due to their dps and utility respectively, however, I’m sure u could replace gala chelle with a suitable ranged dps and howen can def be replaced by any decent healer (preferably with max hp buffs e.g. og lowen and formal noelle)
Arsene on veronica might be replaceable with a shinobi or r!nidhog, but haven’t tested
r!nidhog on g!chelle can def be replaced with any strength dragon, especially cuz mine is only 0ub
GnC is def a nice to have for g!mascula for him to get his enhanced s2 out more often but im sure not necessary
EDIT: Upon further testing, h!lowen probably isn’t the best healer in this team since his ai is inconsistent with the hp buffs. Better, more reliable healers would be og lowen or f!noelle
EDIT(AGAIN): If u don’t have veronica, vania is a perfectly fine substitute for her cuz of her dmg and amp synergy with mascula