I just went through the bosses loots and stuff. This is how much each boss loot is worth on average:
Tinkerer Gizlock = 2,7g
Princess Theradras = 4g
Rotgrip = 1,8g
Total gold each run = 8,5g
You can reset a dungeon 5 times each hour which gives you 42,5g/hour
What you can do is to skip rotgrip and only farm tinkerer and princess, this will give you 33,5g/hour. It should be doable with resto build.