You can't use the ascendency of other classes, so to use the Djinn one you have to be a sorcerer as a base class.
Also I have doubts you will find any builds except what you make yourself with mace/minions as that will not synergies very well, but if so you will probably need the one handed mace called something Trenchtimbre which gives your minions attack speed to you as well and can get +2 to minion and sceptre called "the dark defiler" which gives you 5% extra DMG as chaos DMG per undead minion. Alternative giants blood so you can use 2 handed in one hand and use the chober mace that gives bonus minion dmg to you as well instead of attack speed with the sceptre