It depends. I'd advice you to start reaching lvl 90 every game and then you can choose by yourself what you want more - playing in PDs for joysticks or beating Tuber. You may go in PD 43, 51 and 55 every time, if you like. 43 is not very hard if you are not greedy for crystal and you get

at the end of it. 51 is a bit hard, but you could get 2 lives from it so I go there every time (I lost quite a lot lives there and I still lose every now and then). 55 is easy and for points... however, keep in mind that if you beat Tuber and get the

back, you will start the game with one more life!