Lulu could use a small offensive buff for all-around playstyles, especially after the shield nerf which hit Offensive Lulu mains pretty hard.
So I propose a tiny buff to her passive which should only be noticable if building heavy AP / Attack Speed.
However I couldn't decide between one of these two:
If all three of Pix's bolts hit the initial target, Pix deals a bonus 2 - 25 ( + 2.5% AP ) magic damage.
Lulu's auto attacks gain 1 - 42 bonus magic damage on-hit. This damage is doubled on minions and monsters.
These small passive buffs should be able to boost her solo-laning ability without interfering with her support laning ability too much.