I may as well take more things from DMC 2...

Dante can equip up to 3 Devil Hearts, and he'd probably want Quick, Offense, Frost/Flame Hearts, while switching to Healing, Chrono, and Offense Hearts in Devil Trigger.

Quick - enables Dante to move much faster.
Offense - increases the damage he deals out
Frost/Flame - Increase range of melee and adds the respective elemental damage
Healing - Heals much faster in Devil Mode
Chrono - Freezing the time whenever triggering Devil Mode



P.S. I originally edited my last post, but then Raziel posted already, so I post this as a new post so that people don't miss it.