Wizard Tower Spells!

Hello everybody. Today, I was just checking out the Clash of Clans Wikia and the ideas that are on there, and I saw an awesome idea I wish they added long ago into the game; Wizard Tower Spells! Since there was only a sentence that simply stated "Wizard Tower Spells", I thought I could take on the initiative of posting an in-depth description of what I think should come with this new idea.

Basically, with these Wizard Tower Spells, you could assign your Wizard Tower into doing certain spells. Every other consecutive level you upgrade your wizard tower into would get you a new spell you can assign to your Wizard Tower. Of course, you can always choose which spell you would want to have activated, so for say, at Wizard Tower level 8, you can choose between a whopping 4 different spells.
Here are some suggestions I have for each of the spells:

Wizard Tower Level 1-2: Fire Spell- This spell is basically what the Wizard Towers are already equipped with, the ability to shoot those balls of Fire at sneaky intruders.

Wizard Tower Level 3-4: Slower Troops- As soon as this spell is cast from the Wizard Tower, it will cause the affected troops to suddenly become temporarily 50% slower (5-10 secs.) . A more humble version of the freeze spell you will see soon, and when it is used the first time, the Wizard Tower will revert back to the the Fire Spell for 30 seconds before using it again.

Wizard Tower Level 5-6: Confusion- Once the opposition's troops have been hit with this spell, they will turn against their own army and start killing eachother! However, this would only be temporary (5-10 secs.), and as soon as it is used the first time, the Wizard Tower will revert back to using the Fire Spell for the rest of the battle.

Wizard Tower Level 7-8: Freeze- What Dr. Doofenshmirtz would refer to as the "Freezinator", it would cause troops to freeze for a moment (5-10 secs.), while defenses can have all the fun shooting the troops down, and as soon as it is used the first time, the Wizard Tower will revert back to using the Fire Spell for about 1 minute before using it again.

Many of you guys probably noticed that once the spell is used for the first time, it would revert back to the Fire Spell for a moment before using the spell it was assigned to again. This is for obvious reasons- if for say the Freeze spell is equipped on your Wizard Tower, it would basically cause the troops to be frozen for the rest of the battle. That's because the Wizard Tower shoots it's spells at around an interval of 1 second per shot, and the spell lasts much longer then 1 second, if you know what I mean.
So that is basically it! Comment on this thread if you agree, if you disagree, and any ideas for spells that would be better then the ones I made up (I will give credit to you if it was your spell idea ;)).

the freeze spells seem a little op because you only have 3 minutes to attack and a couple of mortars could wipe your troops

Mechanic is too strong and times are also too long. I don't think this will ever see the light.