1.a. Championship
1.b. 1v1
1.c. Random map, Medium (with Dungeon) or Large (without Dungeon)
1.d. 4 minutes
1.e. Any castles, repetition allowed
1.f. Cimus: This can be varied. From a simple kill-everything to a race for an artifact.
2. Approximately 3-4 participants from each clan, and there aren't many clans.
3. Suggestions for the first two points
Added 1 minute ago
PS: Each participant from a clan should have an original town.