gonna ignore the comments and ill leave my own xD
if he is capable of going dual with both alchemists char
then get at least 100 vit on the int dex agi one then have it use resist set --that will be the main damager
as for the vit str crt --this ones a dead build considering its an alche --should have at least live as a bk or gladiator before actually switching to alchemist--although it could still be used like a tank while the int dex build can don a full poison set to make killing the boss faster
i used to be an AGI CRT STR ninja turned alche but i already have lvl 120 smith before i switched
dmg output isnt great but the soloability was good since i had access to sauro blade resist
at lvl 300 with 0 int/dex
i mixed 2 seele zauga on my solo set
Sauro blade l4 hp20% fluency 1
bellow iniliba fluency 1
sieger plate seele zauga fluency1/acc fluency 1
chief god stone seele zauga
my apos wasnt built for resist but for hp since without vit i only had 8k hp with magic barrier2
mixing both haze and t.rev spam to boost my survival ---my high agi was also boosted by acceleration allowing me to auto attack and evade
u can see my dmg outputs on lahunts thread with this particular build