All said, I am mostly swayed by war arguments, even though I put my omake point to Spirit Ken.
The reason is kind of complicated. We don't really need high War (yet anyway), as we are not on a situation where we control people meaningfully. We are mostly an elite commando-type of gal. Seriously, taking multiple people of the same realm is no small feat in a universe where numbers matter (even with stealth and recuperation). However, if we are to continue to fight, we need our War to be at least D or C. The reason is simple: we'll end up in more and more war scenarios, and if we are to act meaningfully enough to turn the tide, we need to be able to determine what our guys are doing and what their guys are doing. For that reason, even if high war is not something I'll go for (yet, at least), we need to enter the express train for mediocre war, or end up flailing around semi-ineffectually the next time something happens, or worse, lose a battle because we underestimate the importance of yellow interlocking buffs. And btw, I am not fearmongering, I am describing what happened and what nearly happened during this arc's first confrontation.