Welcome, yet another major ex-Rocktron guy here. Went so far as to wire my 3-pup LP for individual outputs to feed three Prophesys simultaneously, and that was just the beginning. One Ultra blew that rig to smithereens in short order.
Your getting good advice here - roll your own. I too did not find one usable preset in the Prophesy, version 1 or 2. The Ultra does have some good starters however, just back off those 'look what I can do' effects mentioned earlier. Scott Peterson’s contributions in Axechange are great starting points, many others as well. Feed from there. You may find most of the presets favor single coils. Compared to the LP, my Strat is almost pick and play. A few of Scott’s patches worked with both guitars out of the box too. The Prophesys would not do that very well at all.
You might also try Dutch’s' 'naked amp' bank for starting points. Also, some folks have contributed their whole finished banks. I would like to hear Cliffs, and some others as well.
Are you FRFR or amp/cab? That makes a big difference when auditioning. A patch created for one doesn't work with the other. Many Axechange presets are not designated.
Touching on the drenched presets again, I have to wonder why so many of the Axe's presets are this way. This is not a unit that Guitar Center guys need to go 'Oh Wow' in order to make a sale.