i think they should be able to be hit by  auto attack from demis  but not from  aoes and such

My stance on the ward is that it's part of the spell and is thus "immaterial" and undamagable. That's also how I view Regulus's mines. If the wards is tweaked to be damagable, the mines should be too, and to allow them to be damaged, units should have to walk directly over them to trigger the mines (they are mines after all, not proximity bombs). This way, any Demigod or unit that can see the mines will be able to disarm them.

I agree wtih zech, or atleast have them non targetable, I sometime acidentily targer them with a spell, which is a major problem

I'm pretty sure their proximity mines Thats a bit of both right?

I think the wards should be invisible to the oposing team but are suspectiable to things that can detect invisibility and area of effects.

From the amount of times I've played ooze UB, I have never seen ooze 'kill' a Raise Dead Ward.  (The name never made sense to me - a 'ward' keeps something away, yet this creates undead?)

I don't think I've ever seen anything attack a Raise Dead Ward.  I've tried to attack it directly with my demigod, no luck, aoe seems to ignore it, and obviously creeps ignore it.

I didn't realize they were killable.  Do tell?

There's other ways

I thought all AoE attacks worked on em.

I play as oak pretty much all the time. From what I've seen, Torchbearer's circle of fire can kill the spirits. I think UB ooze can as well not sure. I find a lot of players run to their towers when the spirits attack which is a good enough tactic I guess. 

Although I still see a lot of players trying to mellee attack them as well which doesn't work.

I actually thought they were referring to the spirits because I didn't think it was possible to destroy the ward. I find they stick around even after oak dies. As I've noticed that sometimes when oak respawns a few new spirits appear before I plant a new ward. I always assumed they were from the previous ward.