Why not Extreme Roulette with Allied marks as a reward?
For 2.4 or later make a roulette for Extreme Primals. Garuda, Titan, Ifrit, Mog, Leviathan and possibly Ramuh.
I know this will be avoided like the plague but maybe if they gave Allied Marks as a reward and a bonus if a new person completes it. Maybe even a chance at Blood Spattered log randomly dropping to a party member for completing the daily roulette? Or
Or even making those Rowena Tokens which aren't worth pretty much anything anymore to be exchangeable for allied marks?