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How To Legit Fc
This is a little tricky to explain so bare with me.
You need to have Cs and Fury (or throw if you want) on a right click hotkey. I use X for cs and Z for fury
Now that you have done that there is 2 different types of fc i use, remember to hold down shift for each type!
The Click methodFor this method, you need to have your cursor over your oppenents body so you can see their life. Have your right skill click on cs then switch to fury and back to cs quickly. About a quarter to a half a second later (Not right after!) you click. When you fc you do not see the actual cs, but your enemy does. What you see is what you threw ( a javelin or fury) and then the enemy getting hit by a little lightning thing. This method can be used while running or standing still. When you are running you should initiate a long run, go through with the fc steps and then click as usual while running. This is mainly used for enemys that are on the offense
The Name Lock methodThis method is by using name locks, so once you get one you can fc on your enemy as long as you have the nl. To do this I hold down my cs key on the enemy to have a name lock, then switch between cs and fury quickly. I can't exactly explain the right time to switch between keys but once you find it you'll know. This is mainly used for enemys that are running away
Quick youtube demonstration of the click method