The proper Method of EVOing has been apparently under debate for some time. So I am going to spell it out for you again. Tournament EVO is a different animal and I'm not going to bother discussing it. This is the proper method of EVO in the Lost Warehouse as per the old established EVO rules.
1) On your turn in which you play a card first. Select one of your characters. Use 6 pillz. It is ok to use less or more if the character has an exceptionally low or high power, as long as you use the rest only to modify the power of your character. Fury is NEVER appropriate in EVO mode.
2) On your opponents turn. Send up a character, which you don't plan to level. The more stars the better, but this is not necessary if you're trying to level your 5 star character clearly you don't want to send them up. Any maxxed out characters should be used in these slots as long as your opponent can reasonably defeat them.