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Not sure where that chart went, but I try again as an attachment this time. In case it does not come through the combos J8s does not loose to on this board are: J8, J6, J5, J4, 98, 96, 95, 94, 86, 85, 84, 65, 64, 54 (total 14×16 = 224 combos). And several of these are most likely not in the MP2 jamming range.
Given that you were able to chip up nicely, I guess that the other big stack did not cause you any problems. Part of the reason I am skeptical is that I feel that the other big stack potentially benefits more than you by keeping the small stack in (since he has position on you). However, if the other big stack does not take advantage of this, then I understand that it is tempting to keep more players in.
At the end of the day this is a very exploitative play and we need to be confident that the situation that arises afterwards is beneficial to us. Otherwise, risking 10bb is too much (in my opinion).