Senna - has the weakest AR.

She is not good at fighting in early.
Then I thought like this:

But if Senna has power in early?

That's the concept of this build.
Use your AA range and Skills, make more faster scalling.
Enjoy!

The rune is the key of winning.

HAIL OF BLADES is make you easy to win.

With the rune, you can make more dmg than almost enemy.
If you complete 1core - kraken slayer, also your power is gained up.
Do aggrassive trade is faster way to win.(Actually Speed Running KEKW)

In lvl 1 fight, you must be like a berserker.

The runes help you can deal many dmg.
HAIL of Blades and Senna's Passives have good Synergies.
You can get stack of the Senna's P easy!

The Combo:

AA - AA(P) - AA - Q (About 200 dmgs)

You can stop 3rd AA, if already you get the passives's stack.
WORTH IT

For Example...

Do AA from behind minions, if enemy is Ezreal.
Ezreal will be low, the lane is over lol

You can look kills with ally adc from now.

If you got level priority

Go for get kills. Be a Berserker right now! LET'S GO W GAMING LOL
If you could deal many dmg with Dodging enemy's skill, the laning phase is over. Just destroy their mentals.

The Combo

AA - AA - AA - Q - W

ELSE

GO UNDER THE TOWER, without it, YOU WILL GET REPORT (joke)

Let's start hyper-scalling!

Standard Combo is here:

AA - AA(P) - AA - Q - W

You have to keep in mind to collect the passive's soul.
Do trade more aggrassive to deal more dmg.

You can do 3rd AA - Q for another one to get passive's stack.
It's Key to get early scalling.
Like this:
AA(1) - AA(1) - AA(2) - Q(2) - W
With this, you can get passive's stacks quickly in a fight. (Actually got 2 stacks)

This build is for WIN LANE WIN GAME.

You can dominate bot, but tanky top will break you soon.

My English is not good, but thank you for your reading my guide!

If you have more good guide for Senna, text me in X!: @y4***