What is the fastest way for me to get from lvl 50 to lvl 100. No modding or anything already been reset for that which was anoying even though i only modded for 5 lvls they reset me back to lvl 40 from lvl 127.

I need a pretty fast way to get rp can require me and one other person max. But i would prefer to have it 1 player.

+rep for best response

Thanks