best supports for flame sentinel spectre

Currently using minion dmg + GMP + LMP but it feels a bit too aoe heavy for me.

all advice welcome!

GMP drops my fps like crazy... not to mention i think it spreads the fire balls too wide and misses

LMP - Concentrated affect - minion dmg - fast cast

concentrated effect would only affect the explosion dmg, right? not the fireball dmg?

what are your thoughts on chance to ignite?

"

Area of Effect: The radius of the explosion caused by collision (with either an enemy or a terrain obstruction) is affected by all AoE increases. Full spell damage is done to any enemy in range of the explosion.

Every time the fireball smacks into something it causes the explosion with deals the full fireball damage with can further be enhanced by concentrated

Chance to ignite is a good idea too, you'll often see that a map level spectre pretty much one shots any white mobs you run into. Not much chance to deal that burning damage

my setup:
spectre
minion dmg
conc effect
culling strike
iir
iiq