Tournaments hassles HMM II

I suggest we move on to discussing two similar options.
1. Over a certain period (29 game days, i.e., 1 month + 1 day), maximize the development of a hero.
2. Level up a hero to, say, level 20 (or 10, or 15, or whatever you say) in the shortest possible time.

Map size - medium (M).

Please share your opinions.