Troops Attacking Tab

I Suggest that when Troop and Spells already Deployed the Tab will vanished and all remainingg available troops and spell are the only tabs are there on the screen

Yes, much needed, scrolling while attacking is terrible.
and/or combine dark spell and donated spell

complex armies are fun to plan and execute, but frustrating to fail when scrolling took too long...

I am not so much in favor for this.

I sometimes deploy a lot of archers and other troops in specific order.. I tend to remember the location of the buttons below, while I keep focused on the battle area.
Namely, the first button on the left are my archers.

Not knowing exactly when I run out of archers.. I do not want to make a mistake to accidentally click by clicking the left button again, while that changed to a spell for example.