So this is the best handheld title.
Just finished it up a few minutes ago, Dracula [spoiler]DID NOT HAVE A FINAL FORM?!?!?! wtf this is bullshit[/spoiler] but the difficulty of the fight made up for it. Almost.
[spoiler]First phase, is, of course, a simple waste of your time; the second phase is the part that counts and losing on it makes you replay phase 1 in punishment.[/spoiler]
Anyway, the difficulty overall was good. Hard though it was, using clever tactics and glyphs made you prevail, and magically, you didn't feel cheap using "overpowered" equipment/glyphs, which is a welcome change from SotN's stupendously easy challenge. In OoE, you'd better exploit elemental/physical weaknesses, because otherwise you're in for a world of hurt.
You're incredibly powerful, but the enemies are also likewise terrible in their damage output and attack patterns, bosses especially. During the midgame the difficulty finally started to drop but as soon as you unlock Drac's abode it spikes upward again, and stays that way as you make your way through.
Still haven't cleared out the last two quests that require the Training Hall and Large Cavern, but I doubt I will maintain interest for much longer once I finish them and beat the cavern. Overall, A+ and would do business again.