I'm not a big fan of the long wait cards, if they do start to fire then they are great..but if you get rid of them with short wait cards (0 or 1) then no effect. The longest one I use has a wait time of 2...as far as the energy thing; it only stops you from the missions and not pvp...pvp is a fairly good test of your deck...helps with the tweaking with enough cards.
It's interesting..but if you get the rpg early on its all you'll use. unfortunately it makes it way to easy. though with the p90 how did i get more than 100% accuracy?
after saving up for the 3rd bow I never needed to pick up the sword, and then it was 2 arrows at the most to drop the orcs. what is really needed are enemies that level up as you progress, all in all 3/5.
 "Tyrant"){kind=icon}
 "The Palisade Guardean 2"){kind=icon}
 "Fortress Guardian"){kind=icon}