FCing
I understand most things about it insofar as they relate to common sense I use in other situations... Keep healers around, kite, move with team, position yourself when you're about to die...
One thing I've never really understood or thought about much was choosing a path with the flag. When and why should you go tunnel, graveyard, ramp? When and why should you go roof, 2nd floor or like, running into GY? Advantages/disadvantages of these respective positions?
Ofc you want to avoid enemies and find friendlies. Is there more to it? Picking routes, how much calculation goes into all this? Is it simply a matter on long distance spacing-- go wide if your enemies will collapse on your go short if you can speed past them?
also (more complicated):
What makes the people who are so revered in the 19s bracket for their FCing so good? The best FC I can ever remember playing with in f2p/vet was Hida, and I could never put my finger on why he was so damn good except that he just... never died.... ever... He seemed to always pull magic out of his ass.
(sorry for the minor wall of text)