Short version:
The soft cap is 45% defence.
It is so called because of the way the to-hit formula works, in that part of it in the absence of buffs and debuffs is [50-defence] max 95% min 5% then multiplied by accuracy mods etc.
This means 45% def and 145% are equivalent a large part of the time.
With WP, you start with some typed defences, so to get up to the soft cap, you will want to add to those, possibly with some of weave, combat jumping, maneuvers etc
It's true. This game is NOT rocket surgery. - BillZBubba
WP can easily get away with not being quite sofcapped. Don't forget that RttC provides some -tohit and you can also get Darkest Night for more -tohit.
Also don't forget tohit debuffs get weaker against higher level opponents (100% vs +0, 48% vs +4) while the softcap value remains 45.
I have a ton of debuffers and I regularly take on +4's with them, so I'm not warning you away, just cautioning that if you have a -10% tohitdebuff on the +0 you're fighting, it's only -6.5% on a +3, or -8% on a +2, etc.
What is Soft Cap and can i apply it to my SS/WP Brute
Professor Smoque - Lvl 50 Fire/Fire Blaster
Little Smoquey - Lvl 50 Fire/Kin Controller
Papa Smoque - Lvl 50 Stone/Fire/Earth Tanker
Dr Smoque - Lvl 46 (Perma Bridge) Emp/Elec/Dark Defender
UnNown - Lvl 50 SS/WP Brute