Honestly unless you've hit the wall thresholds for each stat I would say 10 points into str is the absolute minimum for any war. I myself am 2:1 str:vit. I also have relic+1 and full dl. I'm constantly hitting 1200 heals on my IB's with the occasional 1700+ crit. If you're past 6200 hp you already have enough and anymore is just insecurity on your ability to fully utilize your rotations to the max. Stick to the strength and as far as dex goes it seems to have a bigger effect on pld's as they have a shield. Str for wars increases the parry which you want. Btw I went in to coil with this set-up and had no problems until turn 4 lol.