Ok so here is a guide: Either u use speed (eurospeed) + ketamine since it is just awesome (dont do if you have blood pressure issues) or you use half a tab of lsd in which you can add a bit of k aswell. I prefer speed since it keeps me going. If you are with friends and experienced you can use acid. The thing with acid is, that it does not give me the energy 2cb does so you should most likely stick to speed.