It is always better to stick to one tested strategy. The strategy should clearly define entry, stop loss, target and exit price in case of a sudden reversal. If so, there is absolutely no need to have several strategies which would only add to confusion. Several strategies would assist only those who are specialists in writing genetic algorithms where the program will select the best one every time. Not all have the knowledge to do so. For those who trade manually, a single strategy is very much enough.