If I were you I would just delegate STEEM to Magicdice. You can compare returns of all delegation services on following website:
https://www.steemprofit.info/
If you capture "balte" ,a guy who delegates steem power to many different delegatees, you can see that Balte received the highest returns form Magicdice. Therefore Magicdice is, at least for now, the delegatee with the highest returns. Powering up is less profitable than using a profitable delegatee like Tipu or Magicdice. Although Drugwars offers the highest returns I would not invest much steem in them because their returns are sharply declining hence they are a ponzi scheme. Besides, an investment in Drugwars can not be liquidated while a delegatee can be changed in less than seven days. All in all, I would delegat many steem to Magicdice. Note if you have to view steem power you can not use your account any more and thus make sure that your steem power is at least over 20 STEEM.