Dodge team is almost useless on this fight 'cause the two first turns of dodge are wasted on the two first weak pests. Anyway, they do the job only if I'm lucky with super counter, crit, Nazuna attack (and only attack) and good allies.

About crystal actually it's 10 rainbow crystal for rainbow's equipement and 8 gold crystal for gold's equipement. For the other rarity, don't even waste your time and ressource to upgrade themand use the crystal to make higher rarity crystals.