Just the other day, I was doing just fine with my winmillion (Level 10, UV: Extra damage to construct: Low) + Miricle hood + Mighty Cobalt armor. I would do a 140 damage total on a slime in tier 3! Now ever since I bought myself the ash tail gear, my damage got decreased. Now I am causing 70 damage total on the slimes. What is this all about? I thought the whole point of the Ash Tail Gear is to make your attack power high, not the other way around!
Is this a bug, or a knockoff? I can't tell. >=(
The only thing I can figure is that you are attacking slimes at a higher level. The damage you deal increases the deeper into the Clockworks you are, so you could be dealing 70 damage to a slime in Tier 1 (or 2?) but deal 140 damage to a slime in Tier 3.
Aside from that there's nothing I can figure that would cause your attack damage to decrease.