For insurance, many experts just always take it as cover. The point is, that when you take it and the count does not justify it, you have your small bet out, but when you take it and you have a big bet out, the count does justify it. Thus, you are making the right bet when you have a big bet out, and using cover on your small bets. This is called "Counter Basic Strategy" -- a form of basic strategy that is used for cover, that favors the counter.
But, if you must use indices for insurance, then use the right ones. The 1-deck number is way too low to use in the 6 deck game.
But, if you must use indices for insurance, then use the right ones. The 1-deck number is way too low to use in the 6 deck game.