If you want to gambling on Bitsler and Freebitco.in . You have to change stragedy everyday to update . Cause i guess their system is changing everyday too, with the same stragedy you can earn today but you can lose all tomorrow. I think you should have about 4-6 stragedies to change. Good luck buddy!
Even if you have unlimited strategies still you can't win money from this game unless your very lucky. So don't waste your money in trying all those strategies but play this game only if you want some fun but not money. If you're looking for earning money then invest your money either in any altcoins or just buy and keep Bitcoins.