Sneaking up on monsters

[Armentia]

I've got a rogue I'm trying out on a map where there are mass hydras. They don't really cause all that much trouble, but they do slow my bot down quite a bit. I'm wondering if I can get my rogue to hide and tunnel drive over to this group of hydras. It'd either unhide from attacking or if there's enough of em surrounding, go ahead and use my sightless mind ability to get rid of a few of em ahead of time. Is this possible through a macro or will I have to develop a plugin?