I always use our default recipes, with the fan off for the first five layers and then on at 50% (this is 20% in the slicer config for some reason) for the rest of the print.

However, if there is any bridging or non-trivial overhangs, I navigate through the viewer to the level prior to the bridge/overhang, and right click to change the fan to 100%; then I repeat back down to 50% after the bridging is complete.

For larger prints, we print with the chamber heated to 50-55C. This allows the bed to get to about 85C, and we get fantastic ABS prints. See https://www.facebook.com/hyrel3d/posts/619391138202253