Better School of Illusion

Illusionist wizards are kind of trash so I made the better illusionist I've wanted, I don't think it's too over powered but I don't really play wizards so it might be. Hope you guys like this is my first homebrew :)

Illusion Savant

Beginning when you select this school at 2nd level, the gold and time you must spend to copy an Illusion spell into your spellbook is halved.

Calculated Preformances

When you choose this school at 2nd level, you learn the Minor Illusion cantrip. If you already know this cantrip, you learn a different wizard cantrip of your choice. The cantrip doesn't count against your number of cantrips known. When you cast Minor Illusion, you can create both a sound and an image with a single casting of the spell.

All illusion spells you cast no longer require a verbal component

Also you can now use your Intelligence modifier instead of Charisma for any performance, or deception skill checks.

Illusionary Protectors

Starting at level 6, you can cast mirror image on yourself without expending a spell slot and it is added to your spellbook if you don't already have it. You may cast it equal to half of your intelligence modifier (rounded up) per day, regaining all charges on a long rest.

You may also cast a lesser version of your mirror image on any creature of your choosing if you cast your mirror image on a creature 0-30 feet away from you they gain 2 out of 3 of the illusionary selves. If they are 30+ feet away they only gain 1 illusionary self. When someone has the lesser version of mirror image the rules of regular mirror image still apply as if you had 2 or 1 images. 

Haunted Minds

Starting at 10th level, whenever you cast an illusion spell that cc's or otherwise impedes the opponents actions (like phantasmal force or mental prison) you may truly haunt the minds of them digging out the deepest and darkest of fears from there minds. You deal an additional 1d10 psychic at the start of every turn that your opponent is under the effects of your illusionary spell.

If it is an aoe spell the amount of creatures you can haunt is half the spells level rounded up. For example if you cast fear you can haunt 2 of the feared opponents or if you upcast fear to level 5 you can haunt 3 opponents. 

Tricksters Mind

Beginning at 14th level, when you are concentrating on an illusion spell you may also concentrate on a second illusion spell at the same time. If your concentration is broken both spells disappear at the same time. You can also cast 2 of the same illusion spell without either dispelling however they spells must be on different targets if they are single target spells. For example: if you cast 2 instances of fear, both fears can hit the same target. However you cannot cast 2 instances of phantasmal killer on the same target.

Also, when you cast an illusion spell that has a duration of 1 minute or longer, you can use a bonus action to change the nature of that illusion (using the spell's normal parameters for the illusion), provided that you can see the illusion.