I’m using Wiz1->Pyro1->Linker1->Thaum1->Chrono3->SM2 as farmer. It’s decent. Works somewhat as a off-dps/support.
The build lacks offensive skills aside from SM so you need really high MATK to compensate AoE downtime.
For small scale farming/grinding it works really well but SP consumption is a problem (avoid Shadow Thorn whenever possible) and long/high-end grind like stage4+ Challenge Modes pushes the character so much that I need to use SP related cards to keep going and even keistas/premium potions.
I don’t really recommend it but it works fine with a good weapon.
A good trick for HG/Challenge Mode is to cast Shrink Body, Link then Chapparition+Shadow Conjuration or Shadow Condensation (Shadow Thorn is actually weak on links because it’s single target - altho with attribute + Shrink Body + Chap allows it to hit cap 777k to all linked targets depending on the target’s defense).
As a note, you’d need Joint Penalty gem to compensate picking Linker C1.
On the pros side, you’re not too bound to link cooldowns/aggro limit and can kill extra swelled monsters easily and as well Pass your own skills.
It’s pretty much a good alt to have but not as your main farmer.