First of all, you can't sell them down below Chaos level which is better than average to exceptional in most shadows, but not heinous by any means. Chaos strength wouldn't let you throw a car, for instance, but you'll deliver one hell of a punch.
Psyche represents some combination of strength of will, charisma and/or persuasion ability (though you'll generally have to role play persuasion), and, more importantly, innate ability in most powers. It governs any sort of mind to mind contact, with the connection provided either by direct (skin to skin) physical contact (which may invite a strength battle) or with the mind to mind connection provided by some sort of power. It is the deciding factor in mental combat.
Brand is first in psyche.
Strength is a measure of how strong you are in terms of pure physical strength. It determines how much you can lift, how high you can jump, and how much damage you deal in any sort of hand to hand fight, etc. It also determines how much pounding you can withstand before actually getting hurt. It is the deciding factor in a barehanded fight.
Gerard is first in strength.
Endurance determines how much punishment (in terms of injuries) you can take before you fall over, how long you can go with out sleep, how long you perform at your best, and how fast you heal. The higher your endurance, the longer you can perform at your peak in another stat. In any sort of close fight, if one side has vastly inferior endurance, the other side can likely string the fight out long enough that they exhaust their opponent. It is the potential "tie-breaker" in any kind of fight.
Corwin is first in endurance.
Warfare is skill in any use of weapons. It covers everything from dueling to leading armies. It represents both tactical and strategic skill. It also affects things like how well you play games likes chess and go, your reaction time, intelligence gathering, and even hitting the correct person with your physical sorcery spells. It may even factor into political maneuvering and scheming ability, at least for NPCs. It is the deciding factor for any sort of weapons combat.
Benedict is first in warfare.
[Rules]