Well, it was mad easy to get to A level, but my second monster croaked whilst I was training it for S level. The good news is now I can use dragons and such.

Pulled some sorta water Dragon offa one of my discs (actually tried once before. When they told me I had to be A rank or better, I knew it must be good, so I waited and tried again.

).
Hopefully, it dominates.
This whole Monster Heart deal is pissing me off. Yo don't seem to get much for the way you're docked XP when you train.