Total number of combos in 12% of hands 32466 of those there are 10371 combos with spade flush draws
Of those 10371 combos there are 9975 combos with a 9hi fd or better which leaves 396 hands with worse fds(6% have a 7hi or worse fd)
The odds of you both flopping a fd with him at 12% and you with jj8s6s is only 2.8%
Did another pql statement where I require jj8s6s to have a four flush on the flop, and then asked odds oracle how often you both have a fd and got 24%
Code:
select count(handshaving(fourFlush,flop) = 2) /* How often 2 players have a four flush on the flop */ as COUNT8
from game='omahahi', syntax='Generic',
PLAYER_1='12%',
PLAYER_2='jhjc8s6s'
where ( fourFlush(PLAYER_2,flop)) /* ( PLAYER_2 have a four flush on the flop) */
I'm sure you can play around with these numbers some more, but here are the basics of it.