I don't have the answer to the question, but if I know the dealer is using a selective up card method, I would simply not play.
Knowing the exact answer to your question might be VERY interesting...
In Blackjack, "unit" is a term I dislike. In a casino you are using $ in the form of chips. Maybe we can help a little here if you tell us the real value in $ of your current bankroll ? What type of local games are you facing and what are the min bets allowed ? Are you playing casinos with many...
If the dealer is good and use a "selective upcard" in a DD H17 DAS game, from Grosjean BCECAA, the house edge over the basic strategy player goes up to a whopping 5.3%
Why do you get so involved on what others are thinking, saying ?
They CAN'T DO NOTHING.
You play your hands your own way and let them talk, slam the table, get red, etc and you smile. Period.