They all have their merits, but if i had to place them on a ranking and describe them:
4: 🪨 Earth is sadly the worst of the 4, as poison is a commonly resisted status. It is still good, but sometimes being a blockshaper feels more earth mage than the actual earth mage. Doesnt help a lot of the glyphs are overpriced (cough cough spike). Can be pretty good though, it just has nothing on the others. Also, bring a backup damage spell for spiders, as poison does not work on them. I recommend a spike setup
3: 🔥 Fire is a pretty big step up from earth. Fire is still resisted quite a bit, but unlike poison resist, a lot of fire resistant mobs can still be ignited for flare shenanigans. It hits hard, and can do some amazing area denial.
2: This is a very close choice, but i would have to say ☁️ Air is second best. Lightning is used in quite a few powerful nukes,
is a great glyph, it can BULLY mekasuits and other energy based armours if you have Ars Elemental, and in general Air glyphs can easily incapacitate and crowd up enemies for massive group damage. The single target is also amazing.
1: 🌊 Water is the best element in my opinion. Big damage, slows enemies, and can do some crazy stuff.
is especially good with Water, as each cold snap particle propagates the spell, allowing for some serious power.
All of them are good, but this is my personal ranking!