So you're going aoe, I'll make this as short as possible. Don't waste your penya and time for upgrading sets / wep under lvl 90.
It's not worth it.
IMO, you're lvling fast enought to max either the 90 or 105 set, so you wouldn't bother to go after penya when you've wasted your time upgrading 60 / 75 sets.
^ For the people who are thinking about upgrading every set over 60 to +8-+10 D: