...I see my efforts are again needed...
Birthright 11
Blackmoor 23
Council of Wyrms 6
Dark Sun 23 + 1 = 24 Currently updating my Ashes of Athas character so he can be a sponsor-NPC in a 5e campaign
Dragonlance 9
Eberron 21
Greyhawk 22
Jakandor 17
Kingdoms of Kalamar 18
Lankhmar 24
Mahasarpa 18
Mystara 26 - 2 = 24 tangle, trip, and a three-way tie!
Pelinore 3
Spelljammer 19
Wilderlands of High Fantasy 14