This suggestion about a "brim" may or may not help you. I use it more with PLA, but as you'll find on this forum, most S3D users never use rafts.
S3D has a setting to create a "brim". A brim is like a skirt, but the brim is a flat extension that is actually attached to your part (zero offset). Find the setting in the Layer tab. Enter 1 layer, zero offset, and maybe 15-20 outlines. This flat extension helps hold down a part rather than use a raft, which takes more time, filament and removal.
Even if you don't use a brim on your ABS prints, it's a great technique to hold down delicate PLA parts rather than using a raft.