What is the deal of this thread?
Is there an issue with these two skills that I don't know about?

I've been using both frequently and dont see any issues with any of them.
Unleash is amazing for snap aggro on newly spawned mobs or any mob you need aggro on that is close and you do not have target on.

Abyssal drain I use mostly once I got everything clumped together so the mp cost is no longer an issue. Then I spam it and weave in dark arts depending on my hp.

I use abyssal drain instead of unleash due to the extra damage and mp should not be of issue anyway. When mp starts to dwindle I have plenty of hate and can start to focus one mob at a time.