Lissandra The Ice With
Lissandra is amazing in team fights because her ultimate damages everyone within the radius of it, and it does a ton of damage. In my opinion Lissandra is very fun to play, easy to learn and very good.

Put a skill point into your ultimate (R) when ever possible
Second ability to max out is her Q
I prefer to max out my E first because it does a lot of damage and you dont need to get in close to use it
I max out my W last because Lissandra is squishy and usually focused because she is an apc.

I often use my ultimate on their adc or a fed player, this is so my team can weaken or kill the wrest of their team and then finish them off at the end.

Lissandra's Abilities are amazing in team fights, this is because if there team are close together you use your ultimate and a couple of abilities and suddenly their whole team is on half health.
Her ultimate is also really good when you are about to die o to just do some amazing damage

Farming is really easy with all of Lissandra's abilities because her Q and E go through minions and also her W is AoE

Pros
Good poke
Q is spammable
Easy minion farm
Good passive for laning
Amazing ult
Lots of CC
Hard to counter
Easy jukes

Cons
Squishy
Skill shots
Mana hungry early game
High cooldowns