Challenge: Recreate your job in equal or greater complexity using 12 or fewer actions
This is an experiment in minimalism (and the action synergy that can make up for it).
You have 12 or fewer action keys by which to recreate your job in 'equal or greater complexity' to its current version. This complexity must be in the sense of in-combat rotational or macrorotational decisions, not simply what Sect to start in, etc; multiple keys that are all necessarily part of the same decision do not add decisions, nor thereby complexity.
Include any mechanics, class- or job-specific or general, as are necessary.
EDIT: By action keys I mean separate buttons, but where a different modifier (Shift + E or LB + X, etc.) + said button is considered a separate entity. You don't get to have 36-48 just by using Shift, Ctrl, and Alt or LT, LB, RT, and RB respectively.
If you want to use a swap-pane (e.g. an item key at X then swaps out the right face keys to your 4 primary items, or in this case more likely used for, say, Summons)... sure, that'll still be one action key, as it's basically a toggle ability that modifies any number of others, which while producing many more effects would still technically be one ability.