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Ebb and Flow scales quadraticaly with AP. Normaly, for each bounce the heal/damage weakens by 15%, but this weakening effect is lowered with AP. When she hits 200 AP, she no longer loses value with the bounces, and she will actually start to gain more value, appart from the normal AP ratio (0.5 damage & 0.35 heal). It effectivly gains a double scaling for the second bouce and a triple for the third one.
Tidecaller's Blessing damage is based on her target Magic penetracion, and Nami own AP.
Tidal Wave immediatly triggers Nami's passive on herself no matter what direccions she throws it. Allies that come in contact with it afterwards also gain it
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Inner fire dies off if it does not hit a target, but Soulflare always blows up. Soulflare has a larger AoE than Inner Fire, as both the inicial and delayed parts of damage deal it at a bigger area. Combining those 2 facts, you get that Soulflare has longer range than Inner Fire (roughtly +125) and can be used to snipe
Both focused resolve and Renewal deal damage a total of 3 times (0.66 delay between each tick). This means it triggers her passive three times, lowering Mantra's cd by a whooping 6 seconds. If you are planning a snare-Soulflare combo feel free to go once Mantra cd is at 6
Renewals heals Karma once at the start and once the snare yes, but if her target dies before the snare trigers she gets the heal anyways.
Defiance haste, damage & shield AoE is about 75-100 units bigger than the indicator actually shows
Because it does nothing on its own, Mantra can be cast while under any form of CC, even silence and supression
Sanguine pool cd starts at the moment Vlad casts it, not when it ends. At max rank with 40% cdr ( not actually dat hard on Vlad if you go Ionian boots) and combined with Zhonya's active it only has a downtime of 3.5 seconds. You can also cast summoner spells while pooled, such as flash or ignite