It looks like you should be focused on countering the flickers and the walls. Past that, you should keep mana up for countering the torch, especially if they have 'lethal' showing. I would love to build that deck and test it though.
My delver list looks different from yours, focusing more on tempo and counter.
against that new combo tron deck.
How play against that?
UR Tron
1 Izzet Boilerworks
1 Remote Isle
1 Unknown Shores
4 Urza's Mine
4 Urza's Power Plant
4 Urza's Tower
4 Cloud of FAeries
2 Mnemonic Wall
4 Mulldrifter
4 Sea Gate Oracle
3 Compulsive Research
4 Expedition Map
2 Foresee
3 Ghostly Flicker
1 KAervek's Torch
4 Preordain
1 Pristine Talisman
4 Prophetic Prism
4 Snap
3 Hydroblast
2 Pristine Talisman
3 Pyroblast
2 Serrated Arrows
2 Shattering Pulse
1 Ulamog's Crusher
My deck
2 Quicksand
3 Cloud of FAeries
4 Delver of Secrets
4 Ninja of the Deep Hours
4 Spellstutter Sprite
2 Spire Golem
2 Bonesplitter
4 Counterspell
4 Daze
1 Deprive
1 Gush
4 Ponder
3 Preordain
3 Snap
2 Exclude
2 Stormbound Geist
2 Hydroblast
2 Curse of Chains
2 Serrated Arrows
2 Stormbound Geist
3 Deprive
2 Coral Net
My delver list looks different from yours, focusing more on tempo and counter.
How fast have you seen the combo get online?