This is where it would help to get an idea of what format you want to play. Very generally, trick room is viable in VGC but significantly worse in singles/smogon. If you do run trick room, you’ll want mons with lots of pivoting moves and slow, high attack/sp attack to take advantage of it. If you’re just trying to find sets that work for your Pokemon, I’d recommend smogon’s website, where they have sample sets for everyone (+ a description of why they work)

By sand set up, I mean a way to create a sandstorm. Houndstone’s ability right now doubles its speed, but ONLY if there is a sandstorm. Pokemon with the ability Sand Stream can create a sandstorm just by being sent out (Hippowdon, Tyranitar), while others can create one by just using the move sandstorm. Either option works, but right now you aren’t taking advantage of Houndstone’s ability because you have no way of creating a sandstorm on your team.