I’d honestly say if you have a four or five star Torch it’s worth considering bringing him instead if he’s duped. All it takes is one slip up against Mephisto and you have to start all the way over... I had that happen to me (sillymistake and ate a combo in addition to the block damage) but luckily he was already duped. If you feel confident go for it, but be warned! Otherwise it looks great! You more than likely might need another 1-2k units depending on how you can fight. Make sure to take breaks so you don’t lose your mind. And the best of luck to you!