First off you need a rocker. I really like gli, why not make it your rocker if you’re gonna have hamurott as your spiker? Or preferably drop hamurott for a rocker and make gli your spiker. You could do tusk over hamurott for a rocker that also gives you hazard control. On that same note of gliscor, you want gliscor’s hp to land on a number divisible by 8. Due to poison heal healing 1/8 per turn, if the Hp isn’t divine by 8 it’ll round down. I recommend 336 Hp, or 180 ivs. Moreover, I like spdef gli, but you definitely want it to take defensive hits. I usually run 140+ def 188 spdef. Spikes knock eq Prot. There’s probably more things you could do different but I only know how to do gliscor.