Talk:Nautilus/@comment-25411307-20141006084137/@comment-5266525-20141007005856

The main support Nautilus should be compared to is, not Thresh. Both are lockdown supports that try to get kills for their ADC and transition into tanky initiators later on that start fights. On that:

Leona is significantly tankier. There's no way to deny this. Both of them scale (directly and indirectly) with all three defensive stats but Leona's shield just has waaaaaay higher uptime. This is a big deal in the midgame when the last thing you want to be doing as an initiator is exploding in the first few seconds of a fight to any bruiser.

Leona is not penalized with lower DPS if she takes a bit of damage (which she inevitably will even if she's not focused).

Leona's initiating combo is harder to dodge, has a lower cooldown and mana cost, is less telegraphed and ends up dealing more damage especially if she has teammates around to follow her up piecemeal.

Nautilus is obviously better at post-initiation CC output. However, consider the time investment required to get to the point where you can realistically survive as Nautilus for that long with your low base stats and support gold income.