Aretherk ToolmasterOfBrainerd another variant of pili pala combo. This one should be the strongest color combination against aggro decks, but loses hard to decks with "go wide" strategies like merfolk and elves, and is very weak to Stony Silence. It also leaves itself pretty open to graveyard hate, but with the way this deck works, if that is my opponent's best tech option against me, I am probably favored against his deck.

ToolmasterOfBrainerd with this deck specifically, I would love your help. No-one knows Grixis better than you.

This deck is way too white (referring to all the 'white effect' cards, not making a racist joke). Important note about grixis: Do not under any circumstance attempt to 'pillow fort' your opponent. It simply does not work. Instead, you have to be removing their threats through spot removal or sweepers. This rings especially true for those Ensnaring Bridges in the sideboard - they need to go. Instead play Engineered Explosives, Pyroclasm, and Damnation. Anger of the Gods exiles Pili-Pala which is bad so I'd advise not running it, although it is normally one of the better sweepers in grixis. The one exception to the no pillow fort rule is Remand. That card is beautiful and should probably be a 4-of in here.

What are the Faithless Looting for? I don't think you have anything you really want to be discarding and card disadvantage matters in most decks. Thought Scour and Serum Visions are both fine alternatives, with the latter being the better choice in here.

I'll be honest. I don't think Painter's Servant is that great vs eldrazi. On the play it's probably fast enough, but I don't see it doing much when you're on the draw. Not if they get 2 turns, in which they can do quite a lot. It's also kinda a pillow fort card too. Darn white mages.

Do you plan on ever using Hurkyl's Recall to bounce your own Pili-Pala to your hand or do you mostly expect to side it in vs affinity to buy a few turns? Cuz sideboarding 1 more Kolaghan's Command is so much better at hurting affinity if that's what you're going for. That said, this deck is capable of racing affinity, so while my deck prefers to outright kill them, this deck may actually be better off stalling boardstate, but we'll see.

I don't have much for the maindeck. I haven't playtested it yet and don't have time right now, but in the next few days I'll definitely have to.

Looting isn't included becauese I particularly want to discard anything, but rather it filters really nicely. If I draw land heavy I can sack lands. If I draw 3 pili palas I can bin one or two. If I draw a bunch of removal... Well I probably should have mulligan'd but still. It also helps me filter Aether vials after the first one. Only one vial is wanted per game, and looting starts providing actual "draw" when it filters out vials.
Pyroclasm over bridge seems solid. Most of my creatures don't die to it which I like. I can drop one recall for another sideboard Kommand and the other for something like an engineered explosives. Having one against token decks and decks like lantern control isn't too bad.
I see your point with painter's. One of the reasons he is good is that if he names blue he lets me turn GA into a superion factory... But that isn't as potent in this deck as it is in the Esper version. I can replace him with damnation.
Remand isn't gonna happen. This deck doesn't need more long game, so I don't want a card that takes me there. Yes the deck can grind for a while, but I would rather have those 2 for 1 grinders than what is technically a 0 for 1 stall card. Not to say remand is bad, just that it's outclassed here.

I'd recommend a 1-of Desolate Lighthouse over Faithless Looting then. You really do want to break even in card advantage. One of the biggest quirks about Rocket Science is that with looting, I absolutely cannot cast it until I have something to discard or need an out. Until either of those conditions are met, I just let it sit in my hand.

Remand is technically a 0-for-0 tempo play because it cantrips, but regardless I see your point. I'll have to test the deck before I know.