Basically you can spend your XP on upgrades you want for kits. Here are some examples 3 upgrades for all kits. Vampie : Upgrade 35% drain to 37.5% drain max will be 45% Scout : Take 65% less fall damage Max will be 75% and 10% chance of taking no fall damage at all Swapper : Chance to give player blindness for 1 second Max 3 seconds ( I don't like the swapper one just using it as an example ) This seems best to work out for vampire and scout because how they are now they really do need some what of a buff.