Have you thought of using Fling instead of Brute Force?

That way if you cast something for free you can sac it to deal dmg before it gets auto sac'd from Incandescent Soulstoke same with Ball Lightning. Maybe Temur Battle Rage to buff your big guys to go for lethal.

RandomGenesis Would be better to use both Fling AND Brute Force tbh, so after some considerating I concluded that Fling would make a better job securing my damage than Reverberate does (actually, it doesn't secure anything and is sometimes such a dead draw). I considered adding Double Strike Instants / Sorceries but I'm not sure about it yet since I don't see what I could remove in order to add some.

If personally wouldn't run Ashling the Pilgrim as well, its to slow, i can see why your using it but in the modern format they would let you waste your mana then kill it. Maybe sub in Hound of Griselbrand because you can summon it, sac it for dmg, or use ur shaman to summon it, hit em for 2, DS haste, then it sacs and comes back biger, also fling proc right their. Maybe three of the hound and have a one off of Liege of the Tangle it may be green but u can hard cast it with your dork, and use your shamman for him and all your land becomes a treat for 2 mana, plus anouther big guy for fling proc.