Head down,rear dump...head up,front dump,never use the inflator hose.
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I dive a horseshoe wing without a crossover, and I actually added another butt dump to prevent having to roll the wing in a horizontal or head down position to trim.
unless you are wearing your wing upside-down, I think you meant "head up"......
I do almost exactly the same.Whether it's recreational on a PLF (Pretty Little Fishies) dive, or, obligated and carrying stages:
I use the rear dump ~85% of the time
Use the inflator hose to get underwater at the begining of the dive
Use the inflator hose to squeeze the last bit of air out of the wing at the 20'/10' stops - I just can't get the wing completely empty on the rear dump alone
All the best, James