wonging with an unbalanced count

I am using the KISS count for 6/8 deck games, (black 2, 3-7 +1, 10-A -1) so at 6 decks when the running count has risen to 12 (from 0) this is precisely a TC of 2. I plan to bet flat at this count until the count goes down and then Wong-out when the count goes down. My question is, since the unbalanced count loses accuracy away from the pivot, what is a good table departure point (say a true count <= -1). Also, is it a good idea to use a 1-2 spread, and say go up to 2 units when the TC is >=4. My simulations (using Hi-Lo with TC 2 entry) give nice edge around 1%, is this level still achievable with an unbalanced count. My intuitive guess is yes, since my TC 2 calculation is exact. Thanks in advance.