build idea: equilibrium comet smith

I want to try this, but I don't have the time. So I'm just putting it out there. Let me know what you think

Comet smith would work like this:
-Smith of kitava's spell on melee hit triggers living bomb
-Living bomb explodes due to another melee hit, and leaves behind a remnant
-Cast remnant-empowered comet
-Equilibrium, Sigil of Fire, Sigil of frost all increase dmg by 30% each

after a couple hits it should just be consistent aoe dmg and remnants
not exactly sure of how the math would work (dmg*1.3*1.3*1.3, dmg*(1.3+1.3)*1.3, or etc)