[Calahan]

Best advice anyone can give you is to just stop playing SP. As it turns you into a terrible player with awful habits. Such as for example, making you think buying insane amounts of PD, which you have done, is ever a good idea. As it is not, ever. And using or indeed relying on such awful strategic ideas in SP games is only teaching you how to play the game incredibly badly, and pretty much guarantees you will never learn how to play the game properly.

SP games offer little value to improving as a player, but if you also make no attempt to play properly in SP game, then SP games become genuinely harmful and the end result will only ever be a dreadful player who has no idea how the game should actually be played. But if you're happy with that then please carry on.