Getting smacked on game night, help

So here’s my situation, I usually build decks on a 1-150 dollar budget, and I like good synergy which helps me compete with the decks at the table with 5x what mine are. I’ve never been someone to look at decklists online and just copy one, but this time that’s exactly what I want to do. I have a roughly 200$ budget, and I want either a combo focus or something that can consistent kill 3-4 other players in under 10 turns. My playgroup tends to get me out first when I have the weakest deck because I’m not going to be able to retaliate, so I want something OP that I can slap on the table to make them think twice about targeting me, or at least give them a reason to. Link your decklists, or your favorite commander to play when you just want to be ruthless.