Re:
now i dont want to be a party pooper, but have you thought about taking it to the lbs, any old skool proper lbs will have it off in a jiffy.
Just got mine back today, £15 to remove stuck bb and a crank arm with stripped threads, to do that they retapped the crank arm and used an oversize puller. i can even still use the cranks
having spent many many hours cutting off cranks, blunting tools, causing pain and injury to myself i have learned the hard way.