User blog comment:DarknessStriker/Which support should I choose?/@comment-6003864-20130520011702/@comment-5955640-20130520185502

Nunu is good late game IF you can get that ult to work. What are you going to do otherwise? Nothing. Meanwhile Lulu can ult the tank. Silence the mage. Shield the ADC and fire into the enemy lines slowing them down.

Blood boil makes their damage obscene? Last I checked it's just attack speed and movement speed. Janna actually increases the attack damage you when she gives you her shield. Lulu's Whimsy gives you extra AP when cast on you. Sona's Q aura passively grants you extra attack power and ability power.

Nunu can't protect the carry. After you shoot that ice ball you have no peel and no way to deal damage. Rammus and Shen can protect the carry twice as well what with the taunt to directly attract aggro and shields that reduce damage. Seriously, see Nidalee's heal effect on an ADC and you'll see what I mean.