Board Thread:General Discussion/@comment-26506958-20151229192121/@comment-26506958-20151229201746

Vulca is easy to explain as Temporal Stun negates any buffs Vulca receives, leaving it with lowered defense. Clock lets you escape/chase Vulcas with their speed buffs activated while time crack starts doing ~5-7 damage to them (If they debuff themselves). My special Tempus combo also helps shred their defenses (E>E>V/Z/C). I've only lost to a few Vulcas with Tempus and they were close fights.

Obsidian is lower because of all the details you need with the obelisks. If they're spread out I can go in and fight without worrying about fissure destroying me. If they're closer together I can use graviga from a distance which (in my experience) gives the option of getting them away from the obelisks or letting them get hit by graviga, possibly stunning them.