Where did these go from Tristana? Pretty sure this is a bug.

Q - Rapid Fire "NEW" ULTRA RAPID FIRE: Basic attacks while Rapid Fire is active reduce the cooldown of Explosive Charge by 0.5 seconds (doubled against champions)]

Rapid Fire's cooldown is reduced by 1 second for each basic attack she lands against an Explosive Charge'd champion.

"When it comes right down to it, hyper-carries amongst marksmen usually care about one thing: basic attacking. As her primary source of damage, Tristana often felt awkward about giving up DPS to cast Explosive Shot, only to have them escape before she could make use of its damage potential. Adding the cooldown incentive should make it up to her, as well as giving her things to do when she's forced to shoot the durdling brawlers and tanks that try to scrap deep behind enemy lines."

Q - Rapid Fire RAPIDEST FIRE: Each basic attack against a target marked with Explosive Charge reduces the cooldown of Rapid Fire by 1 second

Didn't recall them changing this...I checked her patch history and I can't find them removing it... http://lol.gamepedia.com/Tristana_-_The_Megling_Gunner#Patch_History

Pretty sure this is bugged.

"Tristana

Change Goals Begin to shift Trist away from late game clean-up hyper carry to more of an all-in AD caster. Empower mid game all-in strength while stripping some power from late game sustained dps. Clean up of minor cooldown returning mechanics in favor of more impactful Rocket Jump resets. Q - Rapid Fire No longer reduces [E] CD on hit while active Attacking [E] Target no longer reduces [Q] CD on hit. CD 20s -> 20 / 19 / 18 / 17 / 16s W - Rocket Jump Dmg Rescaled 80 / 105 / 130 / 155 / 180 -> 60 / 110 / 160 / 210 / 260 No longer deals increased damage per [E] stack Now also resets on Max stack [E] Detonation on Champions E - Explosive Charge Now detonates instantly on 4th stack (max stacks). Bomb Animation shifted to represent this. Tristana’s abilities also add [E] stacks. Missile Speed 1800 -> 2400"

Nevermind.