The achievement description reads as "The number of rounds won with no healing synergies on your tea..."

I somehow got this achievement despite my gauntlet team having a healing synergy (just the one). I have not changed my gauntlet team, and actually obtained this with my current gauntlet team.

My team is as follows: 3 Kits, 1 Tawny Rodrill, 1 Kickstarter Krane. It gives me exactly 1 synergy with the healing ability. Unless the cut-off part of the description indicates otherwise, I shouldn't have been awarded this achievement. It has been claimed (auto-piloted the claim) but I have not claimed the award delivered to my inbox.

It might be that they mean the synergy that you get when you have 3 on the team (so that you start every round with a bit of healing). This is just a guess though.

In any case, the wording (both the individual circle and the effect of stacks circles being called synergy) is very confusing.

Should have hit the first synergy though, two from the krane and one from the rodrill.

As of today's Patch 1.1.6, this bug has been fixed! I'll go ahead and lock this thread.