An idea I had for a group of spells. Thoughts?
Render Inert, Lesser
School Abjuration; Level Alchemist 1, Druid 2, Sorcerer/Wizard 2
Casting Time 1 standard action
Components V, S, M/DF
Range Personal
Target You
Duration 1 min./level (D)
This spell creates an invisible layer of protection around the caster. If an alchemical splash weapon directly hits the caster, the spell interferes with the alchemical reaction, rendering the splash weapon inert. No damage is done to the caster, and the splash weapon becomes useless. This spell works against all alchemical splash weapons, including an alchemist's bombs. After one splash weapon has been rendered inert, the spell ends.
Render Inert
School Abjuration; Level Alchemist 3, Druid 4, Sorcerer/Wizard 4
Casting Time 1 standard action
Components V, S, M/DF
Range Personal
Target You
Duration 1 round/level (D)
This spell functions like render inert, lesser except where noted above and that it can stop one alchemical splash weapon per three caster levels. However, it can only stop one alchemical splash weapon per round.
Render Inert, Greater
School Abjuration; Level Alchemist 5, Druid 6, Sorcerer/Wizard 6
Casting Time 1 standard action
Components V, S, M/DF
Range Personal
Target You
Duration 1 round/level (D)
This spell functions like render inert except that it can stop one alchemical splash weapon per caster level and it can stop more than one more round.
As a defensive spell, I would make them all 1 min. per level.