u/Bizzle94588

I have a big local GT coming soon and I’m looking for some things that can kill C’tan. What would you say are the best units or combos that can kill C’tan (in general)?

For context for my case specifically, I dont own:
- Eradicators
- Redemptors
- Vindicators

I do have:
- 10 Sternguard
- 1 RepEx
- All Ultramarine characters

I do have 12 Victrix but minus 1 damage is hurtful. And I love my Lancers but praying they fail 4++ is not a strategy. I heard best way to deal with them is to tie them up with trash but I dont know what that would be, just move block some sacrificial scouts?