Anyone have tips for removing the front sprocket?

Anyone have tips for removing the front sprocket?

I don’t have an air impact and I had the bike almost fall on me trying to crank on it with a breaker bar and someone standing on the rear brake. Already used a bunch of penetrating fluid.

I tried to un stake the nut with picks and a chisel after this photo was taken but I couldn’t get my pick under the nut. Who ever staked this loved their air hammer. I’m going to harbor freight tomorrow to grab more picks but would love any advice.

2006 R6

You all cyber bullied me into buying a cordless 1/2 inch impact driver. Took 8 seconds to get it off and the new one on. No I didn’t ugga dugga it back on, I used a torque wrench. I’m broke not stupid.