This was without using Well of Souls, without using the eighth card slot, without upgrading any towers beyond their second-tier upgrades, and without spending any gems on revives.   Doing any/all of those should compensate for any extra base damage my over-leveled towers do.

I got unlucky with headshot not taking out the Hatchmaster early, and ended up having both heroes die in the final wave; Bolas and Clarion were enough to finish it without revives, though.

Thaaaaaaaannnnnnkkkkkkk yooooouuuuu much *sigh of relief* (i thought noone was going to answer...).