By the time Ashigaru is out, Will-o-the-Wisp will be available as well, won't it?
In the meantime though, I'd be tempted to compensate by way of reducing the rez cost - Oversight AI seems like a decent fit here. Let's be real - they're not breaking it with Corroder, and if the Morning Star comes out, most of the tax you'll ever get out of Ashigaru is done already. I suppose there's the odd case of Grappling Hook + some other method to break the last sub (e3, Corroder, whatever), but... shrug
And the good news is, your deck is already full of recursion, so you can get away with 2 Ashigaru, 2 Oversight AI, and recur them ad nauseam.
(it's either that, or blow the dust off of Experiential Data )