Board Thread:Question and Answer/@comment-91.38.68.168-20170429225536/@comment-16682378-20170430015901

Yeah buffers like Enforcer are a crucial part of the game, you won't get far without a few of those. Slime Queen is a decent filler I guess as you are new, but as you progress she will be used mainly to Upgrade high level cards or sell for medals.

Mirror Maiden (UR) don't really have a useful skill for battles, I'm guessing you're using her has a tank, but you should probably try using some other card asap. MM's main purpose is to evolve other cards, chose carefully as they are hard to obtain.

Btw, the story ends at area 5-3. The 4 extra areas are called Special Areas & is more for grinding materials and pts. I would advice against going there esp. in the 2nd half of the events when Elemental Hall has opened, since most usual killers won't help you. They are grinding pts, cards etc in there.

Doing the normal realm is a good idea, make sure you complete area 8-6 & 10-6 = good rewards. It was ages since i did it, but there are some useful cards & other Area Rewards. Although mainly R cards iirc, but they can be used for the random encounters from the maps or in dueling - the opponent will have similar streangth cards. Dueling for the relics is also a way to get Metal Slime which you should amalgamate with Gold Girl, and sell the resulting Medal Girl for 1500 medals.