I have been messing around with various bombs for a while and I think I have found a nice way to use vortexes in an offensive way (enough to be a fun, viable solo strategy).
The general populace uses vortexes for collecting enemies so they or an ally can unleash a brandish or autogun charge into the group. What I have been doing is using a Voltaic Tempest to Shock groups of enemies and then using an Obsidian Crusher or an Electron Vortex to deal damage and help capitalize on the "Chaining" feature of Shock damage (by pulling shocked enemies together and holding them there). I'm Planning on upgrading my full set to include an AshOfAgni as well as a StaggerStorm. I'm wondering if this is a Viable plan or should I put my resources to making a Voltedge or Combuster?
It'll work well, but not against bosses.