He should be in the game but more for lv60+
Make him main HNM for relic upgrading and Gilgamesh holds all the relic weapons or least quite a few
Hes got 6 arms

So..

Version1 Sword,Axe,Blm staff.Bow 1/2 handed

Version2 Mnk2 handed,Whm,Lance,Smn

Version3 Gun... w/e else they relase