I sold my Aark...
Its a good card, but I ended up buying a separate pre and compressor, because the compressor did not have a a makeup gain. It also had no WDM drivers (they due in September) and as a SONAR user, this was another shortcoming.
I orignally bought the card for its integrated pres and dsp, but found they were not flexible enough for my needs. I run a MOTU 2408 now.
I actually gave you some settings in my forst post. Try a low threshold and ratio, and listen. Make sure you have the record fx button active.
To use it for limiting, select a high ratio (over 7). I found that there was too much pumping with the ratio set high, though.
An inexpensive, but capable improvement would be to stick an RNC into the insert on your folio mixer.