I wish there would be more variety of reasonable options to lvl your char. Right now there are only 3 daily roulettes that are worth the time and the normal dungeons.

You could maybe count until 73 HoH (21-30) in, because it gives nearly the same xp as the 71 dungeon (in the same time) if you include the waiting time.

They should add another deep or rework the xp you get from them and frontlines in a way that scales with your lvl and is equal to dungeons. Maybe 2 (or 2 1/2) frontlines or HoH = Dungeon.

It would be cool if there where some kind of Mini Games that give you a bit xp while you spend your time in the que. Also it would be really nice if i could que up for frontline roulette and dungeons at the same time (in fact queing for more than one roulette at the same time would be great).