Dojo Times

Untransfigured is likely faster than transfigured due to higher mobility (its really important to get to the portal quickly in the first ~30 or so floors). Timing and speed on the early floors is key. if you miss a spawn by half a second you'll be out a full 11 seconds.

With good timing you can hit the spawns with Wing Beat while standing on the exit portal (it's ok to be a bit late, just loses you some hits). Just cast it at the right point in their summon animation. Although it doesn't do as much damage as Gigas it's another way to get the run done consistently.