Well, I guess that is one way to get Lissandra more gameplay....

Really RITO, a hair physics buff? How about getting her a normal AP mage's mana regen and then worry about how it flows in the wind. She has a max rank regen of 12.5 / 5 seconds. Compare that to any other ability spam mage (who uses mana) like for example, Lux, who has 19.6 / 5 seconds and who (let's be reasonable here) spams abilities a lot less because she works around combos and Lissandra is lower by over 1 point / second.

Before you say, but her passive gives her a free ability, lets check on our friend Nunu who also has a similar passive. Yep higher ending mana regen (15.9 / 5 seconds).

Here's the best part. Let's look at someone who only uses abilities because they are needing to either change positionings or there is a team fight. Vayne. I don't believe it. Her too. She has an end mana regen of 13.8 / 5 seconds.

Let's step back a second. You may be asking "but he abilities surely are cost effective to compensate the low mana regen right". Wrong! She has some of the most costly abilities, especially in the early game.

• 85 mana for a Q. Ziggs and Lux have a Q cost of 50 mana and a max of 70 mana. Hell even Karthus has better cost efficiency here (20-44).
• Her W is actually pretty good at a static 50 mana, but when the cd is 10+ and it has a range of 450, how often does this ability even get used outside of team fights and wave clear? Put the high mana cost here since she never needs to spam it.
• E is normalish at 85-100 but again, you use it a lot to travel, poke, juke, engage, etc... so the cost can build up over time.
• R is the only ability who has a normal standard cost of a fixed 100 mana like many AP mages have.

Seriously, she might be the most mana starved champion in the game (haven't gone through all 100 and whatever to check but I am fairly sure at least in the AP Mage category she is).