Need new Pokemon for Hard Mode Nuzlocke

So, I’ve been playing a Nuzlocke of Insurgence on Hard Mode and Taen just wrecked me. His Kyurem came out, outsped all of my Pokemon and 2HKOed my Delta Venusaur, Delta Gardevoir and Gyarados with Ice Beam and Earth Power. My team lacked solid Ice resists so if he hadn’t run out of Ice Beams, I’d have lost.

Any idea of what Pokemon I can use from my box to replace my fallen comrades?

Current party
Delta Muk
Fraxure
Togekiss

Box
Loads of Water types, Water/Poison types, Water/Ice types and Water/Ground types
Marill
Rotom
Boldore (can evolve via witchdoctor)
Vibrava
Heatmor
Mightyena
Diggersby
Bibarel
Regular Grimer
Shiny Trubbish

Any suggestions would be much appreciated.

You could try using Rotom to replace Delta Gardevoir.

I would go with Maril. Azumarill with huge power dishes out some massive damage. I’d run aqua tail, play rough, superpower, and double-edge/aqua ring. If you run double edge I’d make it hold wide lens to make sure play rough doesn’t miss when you need it. Alternatively aqua ring + leftovers makes for some pretty good sustainability