There needs to be at the very minimum a buy max button for buying upgrades since my fingers get sore from holding down the mouse for a solid minute straight after doing the loyalty resets.
I'll be honest I have won 3 times so far due to just flat out upgrading the skeletons and focusing on mana cap while spamming out nothing but skeletons. Cheap? Maybe but its effective.
So I noticed that when you get the perk that every 3 hits is a crit it cancels the effects of the sweep perk and the one that gets neighboring enemies.
Sped up the click&hold and am going to be working on a buy max soon