Otlecs post wasn't targetted at you. (In fact the chances of the ones he was targetting it at actually reading this is slim)

You've got your duo up to 52 so have evidently read and worked out the basics.

I would recommend ungoro (if you haven't done it already) and felwood if you are finding plaguelands hard, then go back at 54, where I'm sure your combo will find it easier going. It would suck not having the ability to heal in some way.

I tried solo levelling a warrior for a while (till about 24) and the biggest negative was not having healing (especially when you get in amongst a bunch of ranged casters).