Dude even on relentless i can still solo elite bosses, But then again they are only red to me and I have 7 minions to take him down so. Its a bit easier. Guess they can't be over 40 or they would be purple to me. Consideing i am 38 and facing them though The missions i am currently running through start at 32 I think that would make a difference. The only one i can't seem to get by at the moment is some mission with inferno. considering he has the title of hero i am guessing he is equivilant to an arch villian. But that is only a guess. Still everyting else will more than likely succum to the fury of my mastermind. I mean i can usually take on 5 orange cons at once so taking and beating on a purple con boss has become a little more than part of the norm. Infact at the moment they are the only ones i consider any real threat to me. Still i have been soloing 90 percent of this chr's existance, But i am not so sure others will fair so well. Well see as soon as i reach 40 which will be soon.