Have you thought about including more creatures that benefit from re-entering the battlefield? Stuff like Deputy of Detention and Spell Queller ??

Thank you for the comment wallisface!

I have definitely thought about Deputy of Detention and I do still consider it a good option. This is why I have it in my maybe board. However, right now the way I'm playing the deck to stay on the controlling front is to use the Reflector Mage or Flickerwisp to bounce creature threats back to their hand and then either Meddling Mage or Thought-Knot Seer to try and remove the threat. I'm not sure if that's overall a better solution than the Deputy in the long run. I just don't like that they get their threat I'm trying to remove back if they have an interaction spell for the Deputy. The mage can try to remove the threat directly, but that isn't always helpful, so at least this route the mage is a second layer. If you have suggestions on where you could see this fitting in the deck over another card, and why, I'm all ears.

As far as Spell Queller it isn't a card I had considered before. It I can definitely see some potential for. The opponent interaction is the biggest challenge for this deck. But with this comes a change to the deck and that's the tough part. I'm definitely going to try to fit this card in somehow, but you have have any suggestions what to replace that would also be welcome.

I feel like Knight of Autumn is your current mainboard weakpoint (as far as this card makes more sense as a sideboard option). I’d be moving that to sideboard and/or ditching them for either the Deputies or Quellers

Hmm that's quite interesting that you say that. The idea for this deck started as Bant, and then went to Azorius because I wanted to eliminate that third color just for a "splash" card. And here I am back at Bant again just because I want to include Knight of Autumn anyways. With that being said, I do agree with you that it is likely a better side board option for truly competitive play and not just with my friends where I've actually had some success using the Knight just because of their deck strategies (and those are far from competitive.) The goal is to take this to a tournament if I can and actually feel like I have a shot to do fairly well.

I would replace the Knight with the Spell Queller as that helps me potentially deal with a lot of the spells I'm trying to avoid. So, the next thing I would have to consider is how I would best manage the side board and the mana base considering these factors. Maybe the sideboard should include three Temple Garden that can be swapped in, and replace the temples in the main board for Adarkar Wastes or Seachrome Coast ? Or maybe some other land?

I haven't even considered what I want to start having in my sideboard yet and there is quite a bit of work for me to figure out there. I've got to go look at some of my best options for the current iteration of Modern. Again, anyone that has any suggestions I'm very appreciative of that!

It’s a different deck entirely, but my esper taxes deck is probably a good sideboard to use as a starting point.

Looks like this:

2x Damping Sphere

1x Eidolon of Rhetoric

1x Kataki, War's Wage

3x Kor Firewalker

3x Phyrexian Revoker

3x Rest in Peace

2x Selfless Spirit

Thank you again wallisface! You have been a lot of help on some advice. I know I was already looking at Damping Sphere and Rest in Peace . Looking at the other cards, the Phyrexian Revoker is an interesting one as well. I planned to take a look at some websites and look at recent tournaments and see what some people are running.