There isn't many. There is always 2-3 at Max. Mostly because of different market situation. You have different strategy for a trending market, a different strategy for a consolidating market and a very different strategy for a sideways market. You first recognise wait for the trigger then recognise whether this trigger is useful for this type of market or not and then you eventually go into that particular trade.
I guess you are not getting the gist at all, there is no maximum for the strategies you can combine, only that you might want to limit them reasonably to avoid confusion. Those that you mentioned are just what the market could do, they are not strategies. And to buttress this, a trader could have three strategies combined together for only trend detection. What about that? Not to talk about considering other conditions of the market to find more strategies to detect them.
Trend detection is generally never part of the strategy, it's the premise or the prerequisite we look for before applying the strategy, so i am looking at it in a different way. For me I have let's say 3 different strategies, each of which has a signal attached with it. I'll find for a signal as per my strategies and then go towards trend detection and confirm whether the signal of that particular strategy is correct or not and whether the relevant strategy will be valid in this market or not.