If You'll have no chance to promotion in next season You should tanking. Tanking is great solution, especially in league full of bots.
Of course You could still win matches with bots, even with tanking. So You should try to do it. Bots have players with salaries = 2-4k. So all You need to beat them is to have players with salaries = 3-5k ;-) You always need few traines and few scrubs to fill squads, it should be enoguh. Bots don't manage minutes (gameshape) and enthusiasm, so it should be easy to beat them, even with players which are worth 1k. And You shouldn't spend more money if it isn't neccessary.