I’m doing that build (Wiz>Pyro>Linker>Thauma>Chrono3), working very well so far with Swell Left Arm attributes maxed, but I’m currently only at Chrono 1 (somewhere near lv160, not sure of the exact level), I have yet to see how bad it goes once mobs get that huge HP increase. I’m saving silver to buy an Ignition rod, I think it may help my build.
I went full INT because of the Transpose skill, and contrary to popular belief I’m fine even without a Cleric, I just use tranpose and drink an alch’s lv10 potion, even if it doesn’t fill my HP bar completely, I get much more HP than the others members of my party, the exception being warriors that invested heavily in CON. Transposing and drinking a potion is enough to survive one hit from overleveled bosses from Siauliai missions, at least.