Mawile

Just a random suggestion, but would a priority tailwind + u-turn/switch from Talonflame help?
You have to be careful using trick room, it's a double edged sword. It's really high maintenance to keep up, and no hold item to prolong the effect. Opponents can also stall with protect and substitutes until the effect expires. Even though Mawile is pretty slow, there are a few things that are more powerful yet even slower than it. Not like many people use them, but Rhyperior and Steelix are huge physical tanks that can ruin its day.

Anyway, maybe you can use a water type/rain support to soften up the fire and ground types, as well give you coverage for those.

[COLOR="#008080"]I thought of using a trick room but it's like what you said....once it's gone, I'm stuck to using the priority move to survive (which isn't 100% bad since Mawile has insane attack stats but OHKO'ing a party is preferable). That is why I went with Sticky Web sorta-suicide lead.

I would need pokemon that benefit from the rain besides Mawile (It'll make galvantula's thunder 100% and Gyrados (switching Crobat for Gyrados because I couldn't find a Crobat farm for me to get Infiltrator and IV train) and Starmie's water STAB more stronger but that's all I can think of.[/COLOR]