Exalted 1.2 (Unblockable)

I love a good exalted build, especially one that wants to be low to the ground. I do see a couple areas in this build that are sort of working against each other, so there's some potential room for improvement.

The basic model of what you're shooting for is a bunch of exalted weenies and some payoff critters to take advantage of the exalted boost. Thus, you ideally want lots of cheap critters all around, as you need lots of critters fielded to make the plan work, and your payoff critters would rather be faster than stronger, as they're gunna get strong thanks to the exalted boost. The good news is that Aven Squire is a little bit of both, so you can get away with running 4 copies of it and then 4-6 other payoff critters and have the rest be exalted with some control elements.

Right now your payoff critters are going for bigger is better, which (see above) doesn't fit super well.

Raffine isn't worth the juice in here, as you only want to attack with one critter per combat, so you don't get the connive avalanche you want. Glastlord is going to be a bitch and a half to cast in here with only 19 lands, no acceleration, and 7 of them coming in tapped. Niko is slow and conditional, and you can get much better value out of other cards for the cost.

Instead, what you're looking for here in terms of payoff is something like Faerie Dreamthief, Mockingbird, and [[Momo, Playful Pet]]. You ideally want to cast a 1-drop turn 1, then turn 2 cast something with exalted and start swinging with the critter you cast turn 1, netting you damage and starting the clock. Alternatively, you could go for some bigger payoffs that hit with a bang like Sublime Archangel.

Your support cards are a little underperforming and/or don't fit as well in here due to the mana curve. The two charms are too weak and too color-specific to be justified over other options, Counterspell is useless unless you have 2 open mana and the mana to field your other cards at the same time, plus it's UU specific, so only 12 of your 19 lands can cast it, Void Rend is nice but costs too much compared with something like Prismatic Ending unless you're using it against a very specific threat and/or you need it to be uncounterable.

I'd also advise upping the lands to 20 and cutting all the tapped lands, as you very much want the speed to use your early turns, and the bonus colors and extra frills just aren't worth the hassle. Ideally you'd run some shock lands like Hallowed Fountain, some fetch lands like Flooded Strand, and a basic land of each color, but that can be a bit pricy and that might be out of the budget range.

Just some thoughts, not trying to hate on the build.