Machaka and a W9 bless

[llamabeast]

You may well be entirely correct about W9 being better than E9 (you've obviously thought about it harder than me), however this bit

The marginal utility of 20->24 is very small compared with 13->17 (even though the defense can degrade, but there are AP/AN...), the %gain in damage reduction is tiny going E9.

I don't agree with. That last extra bit of protection greatly reduces the probability of any damaging hits getting through. Adding bonuses to already high values is an effective thing to do (for defensive values that is) - it's the same reason giving a water bless to a mounted van is a good idea, because it takes their already excellent defense and makes them almost unhurtable. Similarly, I'd argue that a prot 20 spider will suffer occasional hits and get worn down, whereas against conventional troops a prot 24 spider will almost never be injured.