I don't normally give time estimates for the maps I edit cuz I have one thing those playing the map likely don't.
The DeemerFireworks weapon is something I primarily use in all MonsterHunt games I play. It's fun, amazingly destructive, and pretty. Essentially it carpet bombs everything in its path with mortars that hit like redeemers.
Not surprisingly it alters the time map takes to beat from when I play it and anyone else does.