Practice Tools needs more improvements, and here are my suggestions:
#1) Allow us to change champions in-game, instead of having to exit & re-enter through champion select & loading screen.
This is one of the most annoying part of all. There are times where I wanted to test a certain number of skillshots on a number of different champions, and the part where I have to exit & queue it all up again is just wasting so much time. Let us change champions in Practice Tool without having to exit the game for convenience purpose.
#2) Let us insert more Bots champion for up to 5v5.
I also have the tendency to create Custom Games, and grind it up to Level 18 with max items along with the enemy Bots having it too, just to observe on how certain champions fares well in late game. And it kinda ruins me when I knew the fact that I can only put down 1v1. At least let us create more Bot players, be it at Waiting Room or in-game settings.
#3) Leveling Up should also affect enemy Bot champion.
This is a lot more convenient than having to press "Fast forward 30 secs" each time.
So I hope Riot would at least take these suggestions into considerations for future Practice Tools improvements, especially the 1st point.