In dalaran swears, you always get LoS when you're about to charge and the hunter send out his pet or some garbage.
Well I discovered a little trick so you will get the charge more often.
When the arena starts, stay in the very beginning of the pipe.
When the water shoots you out, spam charge on your target. 80% of the time they will be in the middle, if they are out of charge range it wont work.
You should either charge threw the air like when you intercept someone down a cliff, or just appear on them like a mage blink kinda ish.
make sure your partner tries to jump off right before you get shot so you don't LoS him for a good 5 secs when you have 0 resil.
More useful when you are fighting the same team and you can never get the charge off.