About the support skill system for PoE...

More variations are always welcome - this games is all about it. But so far GGG is doing really good job here. The ones introduced so far are also very versatile and balanced, which is really good. So if that was the main idea behind this thread I don't think anyone need to discuss it more.

About your propositions:
1) I am not sure how much it would be better than existing ones: rain of arrows and blast rain. Going for any skill with dmg conversion to other element with that support, seems less interesting than just getting rain of arrows and some added dmg gems. Maybe I am missing something.

2) Swirling around makes only sense if it is something passing enemies. EK with this would just make BV wiht different dps base, incinerate would be the same as BV with added fire / Avatar of fire and freezing pulse would just act like nova. If we find any use for it, it would be really niche.

3) Interesiting and it could be something nice. But the dmg multipler should be different for it to make sense.