PoE Vaal Spark, Aranthar builds

I'm playing a Spark Inquisitor in a small private league. My goal is to build towards no-hit Sanctum runs. I have been looking at cluster builds for achieving high speed & duration projectiles for clearing Sanctum around corners. Naturally this also requires clearing T14/16 maps. But my overall damage is very low, projected 360K DPS at level 90. The top builds on PoeNinja are many millions of DPS, and they are all heavily aura-stacking. I'm trying to figure out what I can achieve in without access to lots of reservation clusters. I haven't been able to pinpoint where the core of the