Brand actualy he pretty decent farming tools not to mention he has 340 base movementspeed. If he need a change in that area I would suggest buffing the range of his Pillar of Flame (W) a little bit.
As far Anivia goes, she actualy pretty decent right now. She's just pretty situation & other champions basicly can do her job pretty effectively
. If she needs a buff I would suggest addressing the cooldown when she ranks her E. Maybe something like 24 / 23 / 22 / 21 / 20. That would give it 12 seconds with 40% cdr. That actualy would be a fair buff for her if we known champions like Veigar has Event Horizon on 8 seconds cooldown with 40% cdr.