Firestorm gems

Hello

Could someone advice me what would be best support gems for Firestorm in POE 2.0?

I was thinking of making build with large amount of life (Blood Magic) and strength (Fire, Elemental and Magic damage also when close to those nodes of course).

Would new Iron will be any good with example 400-500 strength?

Here's something I was thinking:

-Firestorm
-Increased duration or empower
-Faster casting or spell echo
-Fire penetration
-Concentrated effect or spell echo or ironwill
-Enhance

Skill tree first try:



I would not be using any auras with this build..and forgot to mention that I would use Saffel's Shield for spellblock (that's way block nodes).