Stud8 - cold calling 2 ok with A96 diamonds?

[roggles]

Reads: This is in a HORSE rotation. Seat 4 is an ultra-lagtard. He has $10k at the table and is just splashing around. In the flop games he raises or calls a raise in literally every hand. Once I saw him 3-bet with 36o and bet the entire way. In stud hi he plays the same way. Obviously in Razz and stud8 he can't play the same way, but he is still way too LAG. (BTW there are 2 other players playing exactly like this too and a passive idiot. best table ever). Seat 5 is pretty solid, but obviously knows about seat 4, and is probably reraising light.

How bad is it to play this marginal hand in this situation? When I call what is my plan on 4th if I hit a high non-diamond card?

7 Card Stud High-Low ($5/$10), Ante $1, Bring-In $1,50 (converter)

3rd Street - (1.60 SB)

Seat 1: xx xx 6[img]/images/graemlins/heart.gif[/img]___folds
Seat 2: xx xx 5[img]/images/graemlins/spade.gif[/img]___brings-in___folds
Seat 3: xx xx 9[img]/images/graemlins/club.gif[/img]___folds
Seat 4: xx xx 8[img]/images/graemlins/spade.gif[/img]___completes___calls
Seat 5: xx xx A[img]/images/graemlins/spade.gif[/img]___raises
Hero: A[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/diamond.gif[/img]___calls
Seat 7: xx xx J[img]/images/graemlins/club.gif[/img]___folds
Seat 8: xx xx K[img]/images/graemlins/diamond.gif[/img]___folds

4th Street - (7.90 SB)

Seat 4: xx xx 8[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/spade.gif[/img]___calls
Seat 5: xx xx A[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/club.gif[/img]___bets
Hero: A[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/diamond.gif[/img]___calls

5th Street - (5.45 BB)

Seat 4: xx xx 8[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/club.gif[/img]___bets___calls
Seat 5: xx xx A[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/spade.gif[/img]___calls___calls
Hero: A[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/diamond.gif[/img]___raises

6th Street - (11.45 BB)

Seat 4: xx xx 8[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/spade.gif[/img]___folds
Seat 5: xx xx A[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/heart.gif[/img]___checks___calls
Hero: A[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/heart.gif[/img]___bets

River - (13.45 BB)

Seat 5: xx xx A[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/heart.gif[/img] xx___checks___calls
Hero: A[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/heart.gif[/img] 3[img]/images/graemlins/club.gif[/img]___bets

Total pot: (15.45 BB - $154,50)