Is it possible to unlock EP (Tier VI so 5 star?) at level 50 or am I dreaming...?

For 5* you need 5x 5* chars.just not sure what gear lvl is needed for 5*. I have done him 7* with lvl 75 or so and gear 8. I think with gear 6 max 7 you can do it easy. You can try often as you want till you win. Don't need Crystal to do fighting.