that is exactly where the one small error can occur in the equation, I used 1.8 because in many cases a team can get through 2 fights in 1 minute. The 1.8 gives a little room for extra walking time or an extra respawn or two. The 1.8 is the number of battles done in 1 minute not the length of time needed to fight.
To everybody who thought it will be useful: No problem and glad it can help
To you poor guys that couldn't get it I am sorry but I can't really make it any less complicated.....it is just a complicated equation sorry.
Guides:
Spoiler: