Managed to get a place in a big event, at the last minute. It's expensive enough that I don't want to throw my chances of winning, but I'm a bit off the meta, and have limited time to paint any remaining pieces.

Can anyone suggest a competitive Kruleboyz list?

I have access to:

15 boltboys
10 gutrippaz
Fungoid Cave Shaman cauldron
Rogue Idol
Kragnos
Godsprak
Sludgeraker
Mounted Killerboss
1-3 shamans
Hobgrotz
Killerbow
Marshcrawla Sloggoth
Breakaboss on Troggoth
Warboss on Dog

Pigeonholed into Big Yellas (As if there was another viable clan) and I'm mostly aiming for players choice, but I want to give myself a chance of winning a few games. Played an event last weekend with Kraggy and 15 boltboys, and went 3/0 but I honestly feel like if my opponents were more experienrced my list would have folded if they flanked into the bolt boys (I don't mean any insult either, it was a casual event and although I'm experienced with sigmar, this was my 5th kruleboys game)

Any advice would be appreciated, thank you so much