Maybe some Planar Cleansing or Wrath of God ? Mortify can also provide some easy removal for creatures and enchantments. Kaya, Bane of the Dead can also provide some removal and shreds hexproof creatures.

Yeah, that Settle the Wreckage alot has been Wrath of God May go back to that too, but right now experimenting with the synergy of Settle the Wreckage and Kaya, Orzhov Usurper .

Planar Cleansing hits my own Planeswalkers and they're my win condition.

• Id pull despark for more fatal pushes if you are playing more competitive. Fetchlands will help get those triggers as well.
• Blackblade isnt that great here being it targets another creature, which isnt very prevelent in the deck even with the other Gid's.
• Elderspell isn't that amazing the only decks that play plans walkers are UWx control, Jund, and tron. I dont its quite good enough to be bording in 3.

The current build reflects a reaction to a Tron heavy meta. Your suggestions I will definitely come back to when going into a blind meta.

• You could also list Mana Tithe which can be really annoying to play around. Its hilarious. They turn 3 karn and ask tron to pay one, and they fail. It feels bad for them, but amazing for you. Its also not a card people expect and on top of that its cheap money wise and mana wise.

At the moment I decided I do indeed need PW protection and the ElderSpells (Tron, UW Control, Jund, Oko, Narset)

• Dark Confidant for card advantage
• Kitchen Finks gets you life gain for burn
• 2x Kalitas, Traitor of Ghet can get a win
• Damnation is a 4 mana boardwipe that is easier to cast
• Isolated Chapel is a land consideration
• Anguished Unmaking is better than spark being it gets ride of the restriction and you have life gain.
• Running creatures will help protect your plains walkers as well as provide a clock. It allows you to get worship as a SB or MB card which can be very powerful, if you opponent cannot deal with is. (It can also be found in Gideon spell book).
• Stony Silence should be in your SB and Rest in Peace should also probably be in there as well

When the meta need graveyard hate I pop Leyline of the Void in the Sideboard as it doesn't mess up my Lingering Souls like Rest in Peace does. Leyline of Sanctity gets in the SB for burn heavy metas.

Easier to cast wipe is probably a good note, I also want the exile for Kaya, Orzhov Usurper so probably going back to Settle the Wreckage for a bit.

The Despark slot is up in the air and you're right it might be too cute.

• Settle is nice with kaya but if you are only running one the odds aren't to amazing you will have both out. I would also note that having more than 2 copies of a planes walker isn't great. Drawing the 3rd or 4th copy in a match is annoying being its most likely a dead card. I would consider just pulling some copies out and putting in more cards to react to my opponents board or have ways to protect my stuff.
• Also being you are running only 4 fetches Leonin Arbiter might not be bad.
• I will say when I build competive decks I usually only run 3 basics usually. Its what I see in other decks as well so that is also something to consider.
• As for RIP I would probably board out Lingering souls. When playing against dredge that Rest in Peace resolving will win you the game on turn 2. If they get removal for it it slows them down which is what your deck wants.
• Worship Is also a card that can just win games.But you would want more ways to get creatures.
• Collective Brutality there are two kinds of decks that play this card: Decks with high amounts of card advantage, and decks that have synergies with graveyards. Your deck is neither. It doesn't make a big Tarmogoyf . You also dont have lots of card draw so the card is less powerful.
• Liliana of the Veil is another planeswalker that can help with removal. Its plus one is a downside when fighting blue card draw so it would be a card to board out.
• Elspeth, Sun's Champion can help as well
• Tidehollow Sculler is amazing in your colors.
• Deploy the Gatewatch if you can last to turn 6 often feels amazing.
• Those are just some more thoughts. I hope I have been helpful