Sbloyd, I've been experimenting with this. Blind seems to work just fine, but it's sometimes considered wasteful as it's on a, what, 2 minutes cooldown? That and the other bonus of a stun is almost always immediately negated by someone in the group dealing damage to said mob. Thus in terms of a spell-interrupt it should only really be considered when faithful Kick is on cooldown.
I found myself using it in the vortex pinnacle alot on those pesky adepts. Their heal and damage spells have the same spell cast time and I'd accidentally kick the damage spell thinking they were healing. Thus a handy blind came in, er, handy. Gouge also works but (unless you're glyphed for it) you need to be infront of the mob, meaning you need to be on your game to pull that off. If you have combo points you can use Kidney Shot too. So between those 4 interrupts you'll usually have something covered.
Now you likely know all this already, so I'm really just adding this for anyone who might be passing by and new to Rougery.
Cheers.
/Stealth