Endless? More like USEless!

I ventured into 2v2 Arena today, the first time since the end of Season 4.

To my disappointment, Endless Healing and Mana potions have the SAME cooldown. What's up with that???

I thought they were relatively pathetic to start with (600 mana? Really?), but only being able to use ONE is even worse.

I wish I'd known that you couldn't use both; you can't vendor them and I'd have saved myself 10 Runic Mana pots!