well under Leap Attack it says "If u use PA and LA u double PA damage, however if you use a 2hander, you triple PA damage"Well, everything is multiplied, yes. Strength, magic, smite evil, etc... Generally, numbers are multiplied, extra dice are not. So sneak attack damage doesn't get multiplied in a crit, just the initial weapon damage.
HOWEVER. DnD multiplication is funny. Doubling a 3x crit only gives you 4x damage. Not 6x. Each 2x only adds a +1 to the multiplier. Otherwise there's enough options of multipliers that you could have a 3x2x4x2... and that'd just be silly.
but under lance it just says "You double all damage if u charge from a horse bag" so that means literally that all damage is multiplied x6.
but is it in then only multiplied x4?
and in that case, can u then give me a source? i need to use it to show my player that he made it wrong