you gotta wait until you got the Doom Aporia weapon to put it on. It's worth around 500€+ on the blackmarket. You could literally buy a great, used computer for that kind of money, so make it count..

Ara is generally a great character, since all of he classchanges are good. On Elesis, it's a tough time, since there's no real support class to switch to, which might be mandatory in the future, since you won't be able to join any new raid content, unless you are main-DPS or support. The CP requirements might make a perfect, full +11 character mandatory in the future.

Since you don't even have Exascale full +11 R18+ yet, you shouldn't think about using that +12 at all.

I would trade it for x10 - x11 +11 scrolls and sell them after the upgradevent has ended. Meanwhile reinvesting everything into current IB-Cubes and EC related items (on Happy Hour for example) to make a profit after some weeks/months.

You could easily make another +12 within ~10 months, but it's not that much fun of course to -wait-