I suggest the bonus power be conjuration spells last +1 round, and an extra +1 per 5 caster levels, to max out at +5 rounds at 20th level.
Good idea. Or... the wizard's level is increased by +1 for the duration of conjuration spells ? and an extra +1 per 5 casters levels, of course.
I'd also like to see the conjurer getting an ability more conjury - being able to pull JUST the thing you need out of your pocket would be great. Perhaps they can conjure a mundane, non-alchemical item of a certain GP value that goes up as they level?
Very good idea ! With a maximum price as... 50 GP ?
(and sorry for my very poor english, i am a uneducated frenchman)