Self shield, Self heal, iframe, dispel
Heal, Shield, dispel
Panic, Petrify, dispel, push, slow
Good offensive skills
Game changing ultimate
Good supporting kit
Hard to master
Lack of mobility
Great combinaison of mobility, control and damages.
Always be aware of enemy shields/stealth/buffs and try to cleanse them with your Clarity Potion as soon as possible to help out your allies trading with them.
If you aren't doing anything, you can always throw M2 on a full hp ally since Revitalize (Heal over time) will heal the potential hp they could lose in the next seconds. This strategy is even better with Stimulant.
Use your clarity to pull enemies in the middle of your ultimate.
Positionning is key as Lucie. You have to always be cautious of your surroudings and try to stay behind your allies, especially at the start of the game when you have 0 energy to use for Roll !
EX2 (Petritfy Bolt) the orb to splash petrify enemies and take the orb for yourself.
Try to fake cast panic until enemies have no escapes then panic them into the fog.
Lucies Ultimate(Crippling Goo) is a very strong Sudden Death ultimate. You can control the safe area of the circle when the fog has closed to the point where you cannot avoid Goo.
You can also Clarity Potion enemies out to the death vortex.
Use your shield wisely and be careful of enemy ultimates. You want to avoid using energy for roll so you can save up for your ultimate.
Cancel cast your E (Panic Flask) to bait your enemies defensive spells is key in Lucie's gameplay.
Using M1 (Toxic bolt) on different enemies to keep the DoT running on multiple targets is a good way to maximize your damage output.
If your ally is rushing down an enemy, forcing him to use everything, try to land an EX1 (Deadly Injection) to help your ally bursting your opponent!
Be aware of your opponents energy. As soon as they have enough to ultimate, they might try to force your roll and directly ult on you. Try to secure as many orbs as you can to avoid this situation.
Your clarity potion is a good way to move the orb away from the enemy team and then securing it with your team.
If melee's are trying to take the orb, you can always EX2 (Petritfy Bolt) to petrify them with the AoE range of the spell.