Perhaps we can make this open ended like a blood bowl league. Other people can make up characters and we play occasionally to keep the group well rounded. If a character gets to far ahead,
, we can rest him while others delve in. A second wizard, or variant of, and some of the more awkward characters. Try and keep the group a similar level but also keep the game to four players at a time.
Thoughts?
'Jenkins, chap with wings there...five rounds rapid.' - The Brigadier.