Talk:Hero Challenge:Eze/@comment-28184036-20160411104953

Seriously grind level 1 it cost half as much energy, I find drop rate is the same just  with a level lower, but if you're grinding for sp or a specific type, it's a lot easier to buy a level up for 50 merit points, 2,500 zel and a few units you pick up questing than it is paying 2x as much energy for a higher level unit, almost a crystal per 15 energy is amazing especially given it doesn't cost any keys or have a cap.

If you're past level 100 the difference an extra 100 xp per energy wont help you level much unless you're already very close.

Also don't forget even if you don't get the unit you want, you can always honour summon to get them, I find I have better rates for the starters when it's not an event, this is how I got anima Atro, Magress and Selena (also a breaker lance but I got anima lance on my second run of level 1)