For the Ascent, I would suggest looking for a trail shoe in the 8-9oz range, something with decent traction, yet not overly luggy. Salomon, Montrail, Pearlizumi, North Face, New Balance, Nike (just to name a few brands) all make a variety of models that would suit your needs. Some of the elite runners opt for shoes that are a bit lighter.
Having lived in Florida, I understand that it might be more difficult to find these trail shoes to try on for fit, but I think there are a few online companies that have huge selections of trail shoes and are good about returns/exchanges. Maybe select a few pairs, try them on side by side to compare and send the rest back?