I enjoy combo decks. It's my style. It would be cool to have a "combo" button that lets me repeat a series of actions multiple times like a macro for mobile. And/or the timer should check for life change/life loss and not count against you accordingly. I've been playing Hawkeye's Bow combo in pioneer and my worst enemy hasn't been counterspells or aggro, but life gain. If they make it to 40 life, my timer runs out before I can reduce their life to 0 with an infinite on board as I'm actively demonstrating a loop. I also play Acererak combo in Competitive Brawl, but I understand that looping an entire dungeon isn't exactly feasible, though having a button that runs through "Cast Acererak, respond to the ETB trigger with Relic of Legends and resolve all" would be neat. Another idea would be a button that skips all animations or makes them much faster so I can move faster against the timer and save everyone a bit of frustration. Combo decks aren't so bad to play against when they don't take forever to win!