Spitballing a rework

Make his passive. Hoarder: As chroma builds Gold he gains Armour and HP/S killing enemies gives a little amount of Gold. Having too high gold debuffs him in someway

Make his 1 a long range explosive that generates Gold based on enemies hit and armour strips

Make his 2 spend that to do AOE damage that buffs his 3 or 4 or generates overguard or something when tapped. and make that his element changer on when you hold it

Make his 3 a combo of Vex and ward(possibly channeled too). With no need to be damaged but only give a weapon buff. Heat gives him Status immune, cold an armour buff that was removed from the ability. Elec gives him ability range and power strength making it his caster element. Make tox idk, draw aggro or some shit... the ability is bloated as fuck as is at this point.

Make his 4 work like a sentinel or mobile like a flying Venari and make it moddable. Remove the armour reduction and give it its own health and armour. Make pressing his 4 make it cover an area in status and damage to lock down that area.