By Demons Be Driven
When your demon crits, you have a 50% chance to enter Metamorphasis. Spell power is increased by 50% during Metamorphasis, but duration is reduced to 5 seconds.
If you critically hit with a spell during Metamorphasis, you enter Metamorstasis, preventing shapeshifting for 10 seconds, but increasing demons critical hit, chance, and damage by 20% for 15 seconds, and spell haste (including DoT's) by 25%.
Tics of DoTs from your demon increases your sp by 2% stacking up to 10 times.
Percentages etc. can be tweaked but I would like a build more based off of demon pets especially because of League 3.