How do i get a rank at 400pl without putting every activity on -50/60

Even if i turn in every little modifier that doesnt increase lvl like brawn and no hud. I still need to put missions on -50 atleast.

Id just like to play with my friends who are like 200-300 light. But these missions just arent any fun for them. If there was atleast a way to play with just -40pl enemies id be happy.