Still a great Mid-Game account. Rune farming dungeons can be safely cleared and farmed. ToA and ToA hard can be completed on Auto Mode for most stages. 

Never tried to push high in arena or real time arena so I am unsure off how high you could get.

If you have some questions, just ask them. 
I want to quit the game, but as I spent some money on it for packs, I want to at least get something out of it.