I think depend what are you aiming.
Wiz2>Link2>Thaum2>FF2 are purely for mats farming,
JP-HK-SwellBody-KundelaSlash, which is why Link2Thaum2 must be paired for 8 targets together. This is most popular build for coming new HG290 and HG330 farming.
However, if you aiming for Boss and doesn’t care much about farming. Wiz1>Cryo1>Link1>Thaum3>FF2 might be better, IceWall+JP for 50% poison damage and maximize Matk for Kundela Slash.
But then, there are more builds are doing better than this notably Elememelock.
If you are thinking walking wiz tank,
Wiz2>Cryo3>RC>FF2 also better, Wiz2 is for surespell so you can bloodsucking after bloodcurse.
But I think the recover rate from bloodcurse is bad.
Before the patch we can’t Combo RoG with BC, but I think post-patch today will allow that, RoG no longer limit the skills that you can use. This build also good for PvP/GvG
All are different focus builds, some focus on some SwelBody+KundelaSlash+JP(50%PoisonDmg), some on ShrinkBody(120%BonusDmg)+KundelaSlash+JP(50%PoisonDmg), some focus on Tanky+BloodCurse+BloodSucking