I've looked around for a while now, trying to find an answer to a question of mine. Do Multiple Slayer Boosts (different quantities) Stack? I know that the same ones will give you a longer timer but whenever I get a bonus kill the message says "...from active slayer boost(s)." that extra 'S' really makes me wonder but I don't want to waste a boost if it doesn't work or overrides the current one. Can anyone help me out?