Most popular build in game: Wizard 3 Elementalist 3 Warlock 2 = great AoE, great dmg.
Support builds: Wiz1 Cryo3 Chrono3 Sage1 - where ppl can modify cryo or chrono at their will for Linker or Kino depending on preference.
If you aim for diferent builds, as a wizard i recomend this:
Stat Wise, ppl recommend having 30 - 50 CON and once you reach high levels it really depends on the Physical and Magic defense you can get from your gears, gems and set combos. With this con you should easily get to 17k HP which is pretty normal.
If you are aiming for a RANK over RANK 4 (like sorcerer) a very good soloing build is Wiz3 Link1, this allows you to kill monsters in any map with the Magic Missile - Joint Penalty combo. Then you can just build whatever you like. Also Wizard 3 gives Quick Cast with attribute which amplifies magic damage done to target by 50%, and even sorcerer pet’s benefit from it.
Following this pattern tehn you can find things like: Wizard3 Linker2 Necro3, Wizard3 Linker1 Thauma1 Necro3, Wizard3 Linker1 Sorcerer1 Necromancer3… and many other combinations you can imagine.
If you are interested in Sorcerer, and mostly around summons, I suggest either Sorcerer 1 or 2 only, sorcerer 3 is usually not worth being able to take Warlock or Featherfoot.
A build i would personally recomend is: Wiz3 Linker1 Sorcerer2 Warlock2. Sorcerer and Warlock deals Dark property damage, and warlock increases by it’s attributes dark property dmg in a %.
Sorcerer1 allows you to summon a Devil Boss to fight by your side, and sorcerer2 allows you to command it more and Ride it. Riding the Summon should increase it’s damage based on your INT and MATK, and will allow you to cast de Boss skills at will, seems pretty good.
I will link here a Sorcerer2 in Ktos doing high lvls map,s it’s sorcerer linker with cryomancer.
She uses Rexipher and Templeshooter cards here, Usually templeshooter is the most well rounded and best Sorcerer Card, if you really expertise at it you may summon different bosses for different uses. Bear in mind this Korean has really high MATK gear, so matching her DMG is gonna be hard, it’s just a proof that it can work in high lvls.