There's not a lot of good Caster Feats. I would add these Feats:
Scribe Scroll
(...)
Brew Potions
(...)
There's not a lot of good Caster Feats. I would add these Feats:
Scribe Scroll
You can scribe a spell you know onto a scroll. To do so, you need parchment or paper, ink, and a quill or pen. When you scribe a scroll, you pick a mage spell you know of up to 3rd level. The scroll contains the spell at the lowest casting level available. It takes 1 hour per spell level to scribe a scroll. There is a limit to the number of scrolls you can have at a given time. Each scroll requires you to gather and expend arcane energy. Add the level of each spell you currently have on a scroll. The total cannot be greater than half your caster level, rounded down. If scribing a scroll would exceed this limit, your attempt to create the scroll fails. Once a scroll you have scribed is used, or one year and one day after you have created the scroll, it no longer counts toward this limit.
Brew Potions
You can create potions chosen from the lists below. It takes 8 hours to craft one. You need an empty vial to store the newly crafted potion. Creating a potion requires you to draw on a limited reserve of arcane energy. At any given time, you can have a number of potions created by this feature equal to half your caster level, rounded down. A potion counts against this limit either until it is used or until a year and a day pass since you brewed it. Certain powerful potions count against your limit as if they were multiple potions. The lists below note the potions you can brew and how much each type counts against your potion limit.
One Potion Equivalent: Potion of climbing, potion of comprehend languages, potion of detect magic, potion of disguise self, potion of false life, potion of healing
Four Potion Equivalent: Potion of blur, potion of darkvision, potion of invisibility, potion of levitate, and potion of mirror image, potion of poison, potion of water breathing
Find Familiar
straight from (121712 Packet - Specialties and Feats p.8)
Natural Spell
Druids can cast spells in Animal form.
Spell Penetration
Once per short rest or once per day (not sure), impose Disadvantage on a Saving Throw. to offset Magic Resistance a little bit. or possibly: (Expend slot 1 higher to impose Disadvantage on save.)
Holy cow, I didn't see they made "Find Familiar" a level 1 Spellalready in the rules: take the feat that gives you one first level spell and chose: "find familiar". You get 2 cantrips on top of it!

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.