Totally agree, caster’s spells with the mechanics that have “hive-mind” (decentralized) LoS is totally broken.
LoS restiction (casters should be able to see the target by themselves!, LoS from figure to figure) should be on ALL spells, and this restriction should fix stuff like this, as casters whould need to move into a LoS to apply pressure.
and by LoS I also mean vision restraints i.e. affected by vision modifiers.
This was expected