Licenses for lvl 50

[Ralath]

What licenses go on lvl 50 licenses? I used to think that stuff like Weakened Ogre and Lightning Vivi went on those licenses so I saved those but then I learned that those usually go on lvl 40 weapons.

I will (hopefully) complete this license because I want the extra +5% crit so... suggestions?

I'm hoping for a license that will be a easy enough where I could solo it if I'm really bored (usually ranged magic monsters). I hate monsters like Spiders where they just have a ton of HP and take forever to kill... -.-

And btw, what should I do with my Weakened Ogre/Lightning Vivi licenses... @.@