All potential bonuses

You round up. A level 65 cape fits in 61~70. Wouldn't make a difference if the cape was 70.
The exception to that rule being things like decent HB, which have a reqlevel. So it has to be 70, I think.

Well yea, that's what they were wondering. Except capes/earrings don't get skills, so my post was rather dumb.

Is there any indication that 20% and 30% boss damage stack. I've heard that 30% x2 does not stack in any shape way or form, but a few people are saying 20 and 30% does stack.