Scholar is a good fit. In February Yoshi-P said in the Massively interview (when discussing Arcanist) that the game was most lacking "a buff and debuffing role with added crowd control". "Role" could be a big keyword for "job", and maybe one job wasn't big enough to do all that. Scholar has been mostly a debuffer (detecting enemy weakness, removing buffs and even adding weaknesses to enemies). Maybe Summoner will be mostly buffer and crowd control? We'll see.