You may want to rethink "playable." The 6-5 rule blackjack is worse than the ante, costing $1.04 on a $75 bet. With all the bad rules together, you are looking at over a 2% HE game before considering the ante. With rules, ante, and a $75 bet It is probably TC 6 before you have a slight player edge.
I agree it can't hurt to just say "surrender" and see if you can get away with it.
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