Lissandra buff?

I've been playing liss a lot lately and I have found some things. Her mana issues are horrid. Even if I build a morrelos. Now I understand her passive helps a bit, but tbh a free cast every 18 seconds sucks. I go oom after i get someone to half health. it takes me 90% of my mana bar to poke them down enough to go all in, then i have no mana for the all in. A buff to her passive would help this, or just change it to something else and low her mana costs imo. The passive cd gets reduced by spamming abilites, and it just does not pay off. Her damage is balanced, but in such an unbalanced game calling something "balanced" just means it sucks. I understand shes more of a close range cc mage then a burst. This is what sucks. There is no room in meta for a close range cc mage. Its much better just to pick an ahri or swain. She has nothing significant to bring other then a 1.5 second stun, might as well just pick annie instead. I love her all in potential with E, so either buff her damage and make her an all in burst mage or change her mana costs to help her poke down her enemies. Her teamfight is nice, good aoe ult when she ults herself and nice aoe. These are my thoughts. Just lost gold promos for a 2nd time so sorry if i come across salty.