Talk:Nami/@comment-4636093-20161217003913/@comment-27608806-20161217115520

As far as I can tell, utility is defined as a beneficial buff to an ally, but also vision granting effects (since it grants information to your team). This also means that crowd control is excluded from utility since it is an enemy targeted debuff. We can then compare each of the four champions' kits on this criteria.

Nami: - Movement speed buff on all abilities - Can heal up to 2 allies per cast of Ebb and Flow (On hit magic damage and slow of Tidecaller's blessing I count as crowd control)

Janna: - Movement speed buff to allies moving towards her - Single target shield - Can heal all allies around her for up to 3 seconds

Lulu: - Movement and attack speed buff - Single target shield - Can grant true sight on an enemy - Bonus health to a single ally

Taric: - AoE heal - Armour bonus for a single ally and himself - Shield for a single ally and himself - AoE invulnerability

I would argue that Taric and Lulu surpass Nami and Janna in utility. However it's a bit more difficult between Janna and Nami. I think Janna offers better utility, but it's either conditional (since you need to move towards her for movement speed, and her ultimate often can't be charged for the full duration), or it's limited more by cooldowns. Nami's utility may be weaker, but you can utilise it a lot more than with Janna, since her movement speed procs on every ability, and she can heal 2 allies per Ebb and Flow.

As for Nami being the best support, I think it comes from the fact that she is extremely versatile. She has a solid amount of utility, crowd control, base damage, which allows her to adopt a number of different playstyles based on the situation and the needs of the ADC. She can be very offensive with poke and engaging fights, while she can also be defensive with very good peel, counterengage, and sustain in lane. Most supports specialise in one of these traits while not doing the others so well, but Nami is essentially 'the jack of all trades but master of none.'