Use Hergbrash's Binding belt and Etched Sigil so your disintegrate costs a ton less and also casts your meteor and black hole.

If you still have problems managing your arcane power, you can use Cindercoat in your cube or as your armor and use RoRG to keep your 6 piece bonus

ok, yeah I just started to use cinderhulk.
Someone mentioned to get arcane on hit for my source. This is good?

Not necessary imo