No Path to Exile?

I'm thinking about adding it, but what would you replace? Crystallization perhaps?

Went ahead with replaceing Crystallization

Seems like a good choice.

Oh and I would recommend one or two Collected Company, depending on your budget. If that's not your style I would include at most two Ghostly Prison in the main board and two more in the side board. As Ghostly Prison was just reprinted in Conspiracy 2, copies are very cheap at the moment. I could see them replacing a few Bant Charm's.

I like em, but I still need to play test it some more. Thanks for all the advice!

16 lands with 8 of them being fetches??

I've been meaning to put in 4 more dual lands (probably G+U since the ones I already have are W+G and W+U), and I'm thinking of taking out one of each of the creatures I have 4 of (besides Noble Hierarch) to make room for them. I'll probably do this after im done writing this.

What do you think, zephyr_chang? What would you add or remove? I'd really appreciate any suggestions, as my knowledge of the game is pretty limited and this deck is the one I'd like to buy one day irl, so I kind of want to perfect it as much as possible before I buy any cards.

One thing I noticed about your creatures is that their toughness caps off at 3, but mostly 2. This might be ok for an aggressive deck but I don't think that your deck is one. It means the usual - you are susceptible to Lightning Bolt and sweepers like Pyroclasm and Anger of the Gods. If you want to be in Bant colours, Spell Queller is coming up in a lot of decks these days; Geist of Saint Traft is also quite popular; and I've even seen Rhox War Monk in 4/5-color Zoo decks. I have not seen Sigiled Paladin and Giltspire Avenger played in Modern before, to be honest. I don't think they line up very well against Tarmogoyf, which is something you can consider too if you have them.

2x Ghostly Prison seems kind of random - if you are worried about aggro decks I'm not sure if Wrath of God is better?

Elspeth, Sun's Champion is played in a control shell but again, your deck doesn't exactly look like one. She is strong, granted, if you manage to cast her on time on turn 5/6.

As for your land base, the fetches look great. You definitely do not need to run 4 of each shockland. You need to run at least one basic land of each type, for when your creatures get Pathed or your lands get Ghost Quartered (also something that you can play). Other utility lands in Bant colours include Gavony Township for example (synergises with Elspeth tokens). 20 lands is usually the count for aggro decks; and I don't think that number reliably lets you cast Elspeth and overloaded Cyclonic Rift, so I would suggest bumping it up to 22 or 23 lands.

Not a lot of modern decks (other than Affinity) run Equipments. You are running 6 of them and those two are not played often either. I could see you playing a couple Swords (Sword of Fire and Ice or Sword of Light and Shadow) and that's about it.

As for your Instants, Collected Company has a terrible hit rate with just 20 creatures. Path to Exile is great. Bant Charm is useful but because of the intensive mana requirements it is not super efficient. Cyclonic Rift is ok but don't ever count on overloading it unless you really re-work the number of lands you have. If you are looking for replacements, you won't go wrong with cantrips such as Serum Visions and counterspells such as Spell Snare, Remand and Mana Leak since you are in blue. That would firmly put you as a midrange/control deck though.

As for the sideboard, definitely run the staples such as Stony Silence and Rest in Peace. The rest is up to your local meta.

Took a lot of your advice, zephyr_chang, and overhauled the deck quite a bit using your suggestions. Gonna playtest it later, but I like the way it looks so far.

Thank you for the in-depth review, I really appreciate it.

Did some online playtesting with the new overhaul and it seems to work out pretty decently. Might still need touch ups, and as always I am open to suggestions, but it seems to be doing its job.