Are we really just talking about the length of the battles themselves? There are other essential factors that consume the time!
Assessing the opponent to chose the best options while reading feedback from your Guildmates.
Practicing with those options to test effectiveness and find the one that suits your play style best.
Sharing pros & cons on how the battle went with your Guildmates.
I’m sure there are other factors I’m forgetting; not to mention building teams from scratch when new troops enter the game. Jumping in with cookie-cutter (or pre-made) teams while having one eye on the clock distracted by trophy activity (that can be made up other weeks) is not the best way to help your guild get or stay in the top brackets… if that’s your goal.
Edit: If you found a short cut that saves all that time, please share it. @Jefferson