We all know how much a pain the last word quest be..... I'll break it down and make it easy... Here's how it works you lose 1% for your first death 2% every additional death but you gain 1% for your first kill and 2% for every additional kill with a bonus percentage when you go on a killstreak what you may not know is you get 3% just for winning a match... So it's simple use your regular loadout and right before the match ends switch to your last word you'll get 3% instantly it's that simple now if you're good enough when heavy ammo comes along switch to your last word and go on a killing spree using heavy ammo.