Ezreal+A TopeSManamune + Muramana + Ezreal's Q on-hit lets him triple-proc Juiced — build crit so all three procs crit; late-game Q tacks on hundreds of bonus magic damage.
Morgana+Alma de los OcéanosSMorgana's Q and W cooldowns overlap heavily. With Archmage's Q-reduces-W / W-reduces-Q loop, you can perma-root and burn enemies. Only ~80 ability haste needed for infinite QW — high tolerance, miserable to play against.
Qiyana+A TopeSStack the Archmage hex, then loop Qiyana W (resets Q + adds an element) with Archmage's CDR returns for infinite QW combos. At 100+ ability haste it becomes a perfect cycle — endless dashes, stealth, or CC. Manamune is critical since infinite QW drains mana fast.
Trundle+CrueldadSCruelty + Archmage = infinite pillar build. Archmage + Cruelty, minimize CDs for endless pillars.
Yunara+A TopeSOn-hit Juiced with Q's splash lets Yunara proc Juiced dozens of times per auto, at the cost of being mana-hungry.