I don't really see how Undead are more resilient. (Although the general point of dependency on positionals is correct, of course.) Could you (or someone else) please elaborate why Undead are more resilient than Necro? I just don't see it. They have more AV7, less regen (if you take more than 2 Ghouls, otherwise equal). Mummies should be about the same difficulty to take down as FGs, maybe a bit easier on high TV, and surely easier to surf if they don't have SF. Necro whights can get SF earlier than Undead Whights because they don't have to take killer skills like PO. Maybe it is that Undead play in lower TV environments so there is less Claw on opponents? That could explain statistics, but not survivability in a given environment.