You dont need to use a different strategy, just because a tournament has a maximum of 6 players per table as opposed to the more common 8 or 9. It just mean, you will never be in early position or face early position action, so you dont need to have ranges for those situations. A 6-max table is basically just a 9-max table, where the first 3 players have folded. There is nothing more to it than that.
Sure player pool tendencies can be different, but there are many other factors, that are more important for that then the maximum number of people on each table. Action junkies probably like 6-max, but you certainly also find them in 8-max or 9-max events. So rather than having a "6-max strategy", you need a strategy for dealing with action junkies.