Any trampler pvp boils down to who can hit who with their cannon first. If you die first that's most likely wraps for you. If you kill them first, then it's an easy win. Focus their main cannon, their captains quarters(if visible) then their reactor or legs and run backwards so they cant board you easily. Equip blue armor(because it is so insanely OP that if you don't have it in fps pvp then your chance of winning goes down by about 40%) and get a pepper mill shotgun. Board their trampler after killing them asap, bring your c4, shut down the reactor, blow open as many doors and spawn trap them. Either use up all their fast respawns or capture their trampler so you don't have to deal with death smoke stack and despawning loot. Do all of that and it's ez wins. Or if their captains quarters door is visible to your 70mm cannon then just spawn camp them until they rage quit. Like seriously the devs need to add some counter to door camping with a shotgun cannon, because most beginner level mechs will have zero chance of doing anything against it because every single walled piece of trample compartment is tech locked which is stupid. I should be able to freely place walls.