Talk:Lux/@comment-6701708-20160306005922/@comment-7837708-20160309002606

It also has a 10s cooldown at max rank instead of 5s, doesn't deal damage to everything in its way and has a lower AP ratio. And since it has one of the highest mana costs in the game for a basic ability she's going to run out of mana pretty quickly if she's just sitting 3 miles down in lane to farm. And for a champion with no ways of gaining mana (unlike Xerath) that's pretty bad.

Honestly though, if she's farming with her E early game she is both going to run out of mana fast and lose a lot of minions, and if she does it later on in the game there are plenty of other things you can do besides staying in lane and watch her last hit.