Overall this is an awesome collection of VFX!
I really like the behaviour of your fire shader, it’s got a really cool wispy feeling.
I think your most successful effects are your fairy magic ones. The top fairy glow has a great range of colours, and your other fairy ones have some cool shapes and a variety of nice timings.
In terms of constructive feedback, I do think that in general, the most of your effects use a very narrow range of colours, and I think you could try and balance the brightness of the elements of your effects to try and establish what your primary read is in each of them.
I’ll demonstrate here with a paintover I did for your Arcane missiles (and I don’t have a graphics tablet with my during the christmas break, so please forgive the mouse drawing)
So you can see on the left your original effect, with a colour gradient below which shows which colours you used.
You can see in my paintover, I used a gradient that goes deeper into the blue for the darker part of the effect. Adding these extra hues helps to add depth and interest to the effect.
Additionally, I changed the head of the missile so that the brightest values are at the very front. This makes it so that the head of the missile is the primary element, which creates a clearer visual hierarchy to the effect. On the original image, there is no clear primary element, so my eye doesn’t know what is the most important part.
Additionally, I added a soft glow particle to the front of the missile, to basically be fake “bloom”. This really makes the head of the missile seem hot, and shows that it is the source of power for this effect.