Huh!
The Harpy is interesting! I don't know what to make of it.
4+ daze seems pretty great, and it's unavoidable, so slapping on a defense enchantment isn't going to help.
It seems pretty durable for the cost, even if it can't contribute a whole lot of damage on its own.
I guess this joins the Psylock as a flying creature with a ranged attack. Interesting that it's a full round action (like all ranged attacks?). You can run from a Harpy, and if it follows you, it can only claw.
Is this being printed as Forcemaster hate, or is it just a coincidence that it halves the solo Forcemaster's damage output, is unavoidable, and flies? It's vulnerable to push/pull because of its full action attack and 0-0 range, and Forcefield still works against it, but daze is only removed at the end of the action phase so double strikes from Galvitar or the second attack from Battle Fury both have a 50% chance of failure. The Scimitar is autonomous, though, so it's immune to the daze condition on the Forcemaster.
In re-reading the daze rules, I just discovered that the -2 to defenses from daze markers stacks if you have more than one daze, even though a single 7+ roll is enough to act normally no matter how many markers you have. If you use the Harpy to hit a creature that has already acted, and have initiative next turn and hit it again before it acts, you can then quickcast a spell at it with -4 defense. That's a long way to go to for a small benefit, but if you're desperate it's something to remember.
Arcane gets all the naked-lady status-inflicting creatures, I guess.