Yes, healers cannot "pwn" without someone else. But never fear, Dwoggurd, because that "pwnage" will be reflected in the "someone else's" PK stats.

1. I think winning cabal wars is a horrible measure of pwnage.
It's easy to take a cabal item. And for every cabal except empire and outlander, it's very easy to retrieve it. So the fortress "winning" cabal wars by taking the codex and then having an imperial retrieve it with ease does not mean fortress is "pwning" empire to anyone but you, I guess. Defending your cabal item is also a poor measure of "pwnage." Plenty of cabal items are taken when defenders are offline. Further, several character may play with your playstyle - only raiding for an item when they will completely steamroll the competition. So again, defending your cabal item in terms of statistics is not a good measure of pwnage.

2. I think making enemies flee is also a poor measure of pwnage.
People flee all the time for a variety of reasons. You posted a few logs that show you "fleeing for your life" with 1800 hp left. I don't think you got pwned there.

3. I think PK stats can be a potentially good measure of pwnage.
Let's go back a second.
Some guy said: He liked seeing a COUPLE powerful fortress characters around. (a couple means 2).
You said: Why? SEVERAL powerful fortress characters would be pwnage. (several means 5-7).
I said: SEVERAL powerful characters in any cabal is pwnage.
Elhe said: No, SEVERAL powerful characters in fort is pwnage, but SEVERAL powerful characters in empire would not be able to stand against them.

First, I think it's obvious that several powerful characters in any cabal will pwn their competition. Do you disagree?

Second, I think we can measure how empire powerhouses would stand up against fortress powerhouses by looking at the tangibles: cabal powers, chances for getting the elite cabal powers, and PK stats against their competition. I think if we narrowed PK stats to something equitable, like goodie PKs/deaths (excluding goodie deaths to cabals other than fortress) vs. evil PKs/deaths, we could get a measure of which cabal members are consistently dominating the other cabal members. I think PK stats, used in a manner like this, would be potentially useful to determining how much one side pwns the other. I have a feeling the results would skew towards imperials having more goodie PKs and fewer goodie PK deaths, and fortress types having fewer evil PKs and more evil PK deaths.