I was trying to strike a balance between synergy and enough card power to still win games, but I was more interested in doing degenerate things with the titan than winning. Here's where i'm at... mostly played best of 1. Strong matchup against uw control decks is a +.

4 mire triton chump block (deathtouch), fills yard, etb counters a shockland (ouch)
2 rix maadi reveler rarely is a draw spell, early game filter, helps against aggro or critical mass against control
1 underworld breach good 1 of in the late game, always sided out after game 1
2 revival // revenge so much utility, can return any creature in the deck, don't read the 2nd. half
4 discovery // dispersal obv. graveyard filler, but dispersal is more effective than usual because of the other discard pressure
3 lazav, the multifarious titans #5-7 and occasionally helps slow aggro with 3 toughness, +surveil helps
4 thought erasure +surveil helps filter
3 angrath's rampage doesn't care about hexproof
4 kroxa, titan of death's hunger so much graveyard help that it ends up in play by turn 5 many games and keeps coming back
4 gorging vulture graveyard workhorse, the evasion is sometimes relevant, the lifegain is marginal but ok with triton
2 the royal scions draw, yard, break the titan through against tokens (or vulture for 4)
3 storm's wrath obv. savior against aggro stays over soot because of the walker clause
1 swamp cause i'm prob. horrible at mana bases
1 mountain cause trophy is still a card
4 temple of deceit the scry lands seem to let me cheat and run 24 lands in practice
4 watery grave ouch
4 steam vents same
2 temple of epiphany looking for my pieces
4 blood crypt ouch
4 temple of malice temple of can we get a fetch reprint since power level is meaningless in a world where oko was ok

Sideboard:
4 redcap melee 1 mana rdw answer (weakest matchup)
1 storm's wrath weakish to aggro in game 1 so...
2 agonizing remorse uro/elspeth go away...
2 noxious grasp nissa, etc... go away
1 angrath's rampage not sure why i want 4 now. prob. weaker on sideboard construction than mana bases!
3 mystical dispute everybody's doin it
2 narset, parter of veils give me time to titan your hand, thanks

any updates?
I think I will test out this pile for the funs!
I love Kroxa.