Summoners
You'll probably want clarity cause she has mana issues. Use this till they buff presence of mind on Senna, since she can never proc it cause Senna is not good in lane and does 0 dmg in lane

Other than that you'll probably want cleanse since it is also blue, just like clarity.

Ghost, mark and blue smite also works for those of you who think of themself a little more daring compared to the rest of the playerbase. Or just below player level 5

Build

Okay so here comes the buildpath, I'll give each item their own section. And to those of you who are critical to the buildpath, don't. I'm probably higher rank than you anyway so your opinion is inferior to mine.

Raise Moral: This is honestly just a game breaking item, who wouldn't want to give your whole team a speed boost. While the team charges forward with the extra movement speed you gave them, you can just chill in the back and wave the flag towards the enemy while they lose their LP.

Guinsoo's Rageblade: I played against a toxic vayne the other day who was so f*cking bad and yet they won and the only item she had was Guinsoo's. Meaning that it she was carried by the item.

Rabadon's Deathcrown: So the only reason why you're picking Senna is probably cause you have an Ornn in your game, meaning that you should buy this item. Like have you seen how much AP it gives? It also has great synergy with Raise Moral.

Guardian Orb: Idk for some reason, this Item is recommended on more or less every champion that I play on ARAM so it must be good.

Scarecrow Effigy: REMEMBER BACK WHEN THEY REMOVED THE PINKWARD UPGRADE TO YOUR TRINKET? WELL IT'S BACK AND AS BROKEN AS BEFORE. LIKE THIS IS GAME BREAKING. IT'S A FREE PINKWARD AND IT'S AVAILABLE FROM THE START OF THE GAME. THERE WAS A REASON WHY THEY REMOVED THE UPGRADE FOR THE TRINKET, STUPID RIOT.

Slightly Magical Boots: Well since Senna is a mage she need all the magic available to her. And since there is no such thing as ''Magical Boots'' in the game, making this the second best.

Abilities
Pretty self explanatory, but I've heard some cries about Sennas q being one of her best abilities. And to the ones who think that let me remind you that I'm probably higher rank than you, making your opinion invalid.

Runes
I've always thought that she very pretty slow and rather bad at roaming, so I came up with this build. Some Nunu player inspired me to try it out Senna, since with this rune setup he was able to impact the whole map within a matter of minutes.