About the high resilience and persistence. I was thinking to put a max value for those, depending on your attributes.
For example,
Resilience max value would be (CON+POW/2)x4. So Joe-Average would have max value 80% with CON 14 and POW 12. Resilience would still be a skill raised through experience or even training. As long as your attributes are those presented here, your resilience cannot raise over 80%. If you raise your CON by 1 point, your resilience max would raise 4 points. CON is definitely right stat for this but why POW? Because shrugging of damage is based for your personal strenght of will too. Getting Divine magic, will lower your skill cap, because you have to channel your "mental powers" elsewhere.
SIZ is not an issue here, i have seen really, really, big guys punched to the street with one punch, it is more about muscle and your bodily health, which CON represents.
With Persistence, the cap could be POWx5, because it is all about that strenght of will i mentioned.
In addition, you get penalties from wounds, -10% (or-5%) from every serious wound and -20% (or -10%) from every major wound. These penalties naturally stack. When you get first serious or major wound, the first checks you make immediately after that wound comes without penalties. After that, if you still hold on, you get that penalty from every wound to your next dice rolls. This also applies to persistence check naturally, hard to avoid getting mind-controlled if your thoughts are with your guts that are lying in the street.
For clarification,
Joe-Average with resilience 60% (the max value is not needed in this example) gets a serious wound to he´s abdomen, he rolls dice to stay concious, Joe rolls 54 and he is still lingering. Next round he have to repeat the roll and this time he gets the penalty (immediate shock is gone and pain creeps through he´s spine, that why the penalty) lets say -10%. He have to roll 50 or less now and Joe rolls 34!! "I am still standing" he shouts.
Joe sadly cant act, because of the lost CA´s and the opponent strikes a aimed blow to Joe´s head. Joe gets a major wound from hammer to the head and have to roll two times, first against death, then against unconciousness. to this roll, he gets the previous -10% from the serious wound. he rolls 23 and 45 and unbelievable, he is alive and concious (ofcourse he is in the ground and cant do anything. The opponent leaves Joe to die.
Next round Joe have to repeat he´s rolls against death and unconsiousness (because of the penalties, he roll just once for both, not separately for each wound) this time the penalty is -30% because of those two wounds and he have to roll 30 or less. Too bad for joe, he stays alive because he rolled 23 against death, but he rolls 45 for latter and falls unconcious and bleeds to death within 15 minutes...
I planned to use system like this, if you like, you could add the damage in each locations as penalty as well or not, as you like.
What do you think about solution like this?