you guys are doing more than me- spent two hours at it the other night, didn't really notice the coll energy delay, because of the auto-advance to level 20... so it was level, do 5 fights, level, do 5 fights, etc.

One thing to be careful of, while the base cards passive does not change, the passive is not fixed. IE, I can have a Natalie with a counter attack passive, or a shield passive, or a buff passive. So don't just evolve cards as soon as you have two of them, without actually looking at the two cards...

I am a little curious about some of the skills. I haven't done it yet, but at a certain level (40, 60, etc, changes with card type/evolution) the Album shows you get another skill. So I guess you have to decide if its better than your current skills, at that point?

I am going to need to test my skill slot theory when I get home. I noticed a 2 slot base card has a 3% chance to add a skill slot when inheriting from a 1 skill slot, and a 1 slot has a 20% chance from another 1 slot. So would a 2 slot have a 20% chance from another 2 slot?