My pet Bae is T7 and she's had 9 wins against Fishy, but I cannot get the 10th-we keep tying. Do you think a bomb would help - such as malevolent grenade, or item hunters bomb or acorn bomb?

He blocks quite a bit of icons and his blessing is annoying when it activates but stock up on both Dark Fire & Dark Light potions and use those at almost every single turn. When his blessing isn't activated, try getting a freeze on him if you can, it helps immensely.

I will try that. Thank you very much.