I’m on my phone, so I can’t look at your build, but I can recommend this page from the wiki that taps about hard and soft caps
https://homecoming.wiki/wiki/Limits
of note, there are really only 2 ‘soft’ caps, defense at 45% for non-incarnate content / 57.5% for incarnate content, and to-hit/accuracy, which has a floor of 5% and a soft cap of 95%. You can go above these soft caps, but the benefits it provides are small. Going above these soft caps only provides mitigation against debuffs.
As for Willpower, I personally try to hit the 45% defense cap for S/L/E/N/F/C. Admittedly, this is easier on a tank than a brute, but it’s still quite doable with some finagling. After defense, I try to stack some extra resistance. I the use Vigor Core alpha slot for the health/regen bonuses.