haven are doable in less than 30 min in a solo vni (with perfect skills and a 120M worth fit)
With 2 vnis, you make the better-skilled one assign his drones to the worse-skilled one, an the wore skilled one uses a sebo+painter. His drones go (f) to big tagets while he paints(F1) the small targets ; when small targets are done he paints bigger targets.
since someone uses a paint there is no more need for omni, which thus can be replaced by a drone speed augmentor
Your ticks will however be a little bit lower than if you made two sites with VNIS, because though you kill rats twice as fast, they don’t span and you don’t warp twice as fast