Sorceror controller

I am building a Sorceror controller. The basic idea is to benefit from Heighten spell and Twin spell, and Innate Sorcery to make the control spells really hard to resist. 

I also started with Magic Initiate (Druid) Entangle to get a group control spell and Sleep. 

What do you think are the best Subclass and Feats (including Origin feat) for the control Sorceror? 

I realy like the Draconic subclass as the exta ac, hp and spell are realy good (command as a non concentrate spell to make them come back wtih Approach can make them walk back into your control aoe spells.)

For Orign feat I like Spellfire Spark as it will let you cast  Sacred Flame and cast it as a Bonus Action (PB times/Long Rest) and reduce magical damage by 1d4 once a turn.  this ups your dpr a little and reduce the damage you take a little.

for a level 4 feat if no one in your party has it Inspiring Leader is great.  at level 4 with a 16 chr you are getting 7 temp hp every short or long rest.  In a party of 4 that is in effect 28 temp hp and it scales well.  I also like Telekinetic as it help move people back into aoe spots or move you own team out of them before you lay it down.

Instead of twin may I recommend carefull spell instead.  you can even use it one your control aoe spells at lease for the first save and a few dm's will let it go for the whole duration instead of just the first effect.

Thank you for this, I share your view on the Draconic getting Command and Fear, and AC and HP is always good. I thought about several feats and found it to be a tough pick. Fey Touched helps with two spell slots, snd more known spells but above all a slot less Command or Sleep to enable more impactful turns using Quicken spell at higher levels. Telekinetic is a nice option, but I do not have experience in using it. And I struggle a bit with Warcaster as Extend spell metamagic gives the same concentration save benefit. I see the use of Alert, and struggeled with selecting that or Magic Initiate (Druid) to get Entangle. I do not focus on Dpr in my control build, mainly on control and survivability.

Telekinetic can help with you survival.  You can push a person out of reach of you so you can move with out attacks of opponently. Also think what race was high elf gives some nice spells like a slotless mysty  step.

Also it you take transmitted spell you may want to think about the new cold feet ( can not Denver name) that will slow (movement) when you damage them.

Try to think what you would go for 3 or 4 rounds of combat at each level.  You can only concentrate on one spell and you will mostly cast that one round 1.  Try to have uses for your action and bonus actions for each round.  Can trips and Telekinetic push are good non resources ones when you have nothing else.