1- Yes, it roots you.
2- Yes, which means if you morph it for Dark Deal you still lose 11% of your hp if you interrupt the skill early.
3-No, it takes a percentage of your total stam pool. You can pull off 2 full channels with Dark Conversion.
4- Yes, it stops the skill.
It's a crappy skill because for pve mana return people use spell symmetry since it's instant, doesn't CC you, and comes with a 25% spell reduction for the next cast on top of 20% increased spell damage on your nest spell.
For healing, Critical Surge is far superior. So for this skill to be used at all, you would probably be a build without much crit chance. And sorcerer builds without crit chance are not viable.
Ah good advice. Overlooking that could be painful depending on the build. @ComaetilicoComaetilico wrote: »since you couldn't pay the full cost of that tick... and there will no be a 4th tick at all