My take on this:
If you are playing S17, learn the indicies for the H17 variations.
DD A7 vs 2
DD 11 vs A
DD A8 vs 6
Surr 15 vs A
Surr 17 vs A
Add:
Surr 15 vs 9 , X
Surr 88 vs X
Athough the Basic Strategy Surrenders are duplicated, 15vX and 16v9 are usually at zero. I wouldn't vary play with 16 vs X in no surr. games, its easy to spot counters. My rule of thumb for No LS is hit 2-card 16 vs X and stand 3+card 16 vs X.
Next thing on the list is not to raise the bet until you get a winner. DO NOT just 'index hop' your bet. Wait for a winner, then parlay, or increase. Reduce according to index.
My 2c worth