I think its worth mentioning that it depends what the enemy team looks like, when you wonder what ability to level up next.

If you're against high bursts like Fizz for an example (Which Lissandra counters with pride!)
You'll want to level W as your second spell cause if he jumps you, you wanna get him rooted and Q him and get as much damage onto him before he can run away and push him out of lane like that in the laning phase. Besides, its not very useful to be able to run away if Fizz can basically one shot you so you wont have the time to E away.

Also, W is also a great way to stop junglers from following up on you. I especially have jungers like Yi in mind when I say this as he can easy get close to you, also supporters like Alistar with his knock up will keep you in air just long enough for your E to run out. So when leveling spells its all about what's most needed compared to the enemy team.

Brilliant guide though! Really amazing.

Thanks your time and input is much appreciated, I know this guide is filled with too many words and its hard to read, i just wanted to get my ideas out there and then fine tune the guide as time goes on, as for the items i dont know how to make a group of other optional items because i think that Abyssal Mask would be amazing on her and thank you whale for the advice about the GA i will probably cut it out of the build, personally i really dont think Rod of Ages is every really worth it, as for what to max, obviously you would max the Q first but then it is up to you what to max next, as i said in the build guide i max E next for the cooldown because thats how i like to play her, it isnt always about the damage

I'd go Abyssal over GA. You have a ZH and your ult. If you really need GA, maybe you should rethink how you play.