I've fought a well round Earth main last night in Matsuri. He only had shizune for healer, but his team is full of interruption and shield so it was pretty hard to fight with just standard.

But in the end I still won with slightly higher hp.

I'd say Earth is ok, but he's not really versatile or compatible with many ninjas like other mains.

I played Azure for far too long and the most out of all 5.

If you have another stronger healer in the team such as Sailor Sakura, Hokage tsunade or even mabui. you can't really out damage their heal. It's ridiculous, meanwhile they just keep stacking poison watching you die slowly.