Views: 3196 Timing Summoner Spells
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4 min (240 second) cool down if you Teleport to a tower
5 min (300 second) cool down if you Telepoort to anything else

5 min (300 second) cool down
If at all possible call out the timings when any enemy champion uses one of these abilities.
Look at the game clock and mark the time. When you have a moment type in chat Vayne Flash 12 (which would mean that at 7 minutes into the game Vayne flashed and it is going to be down until 12 minutes into the game.)
The math on that:
Game Time = 7 min
Flash cool down = 5 min
Vayne's Flash will be up again at 7 + 5 = 12 min Game Time.
This is information that you and your team can utilize.
No flash on the their ADC? Your jungler should come by for a gank.
The enemy team used three flashes in the last team fight? Either look to pick-off the champions that Flashed or try and start another team fight before they get their flashes back as this will limit their mobility and escape or engage potential by quite a bit.
The enemy top laner just teleported back to lane? Now might be a good time to go take Dragon as you know that their Top laner is going to have to walk all the way down from top lane to assist their team if they decide to contest Dragon.
Above and Beyond
You are probably going to have to use a 3rd part site like Curse Voice to tell for sure if someone is running

If you know for sure they are running it shave off 24 or 30 seconds for Teleport or 30 seconds for Flash.
Aside from marking the timers in chat, any tips for keeping track of all that information?
Try to communicate with your lane partner. If he is willing to cooperate you will most likely have an easier time keeping track of what's going on. I guess you will get used to keeping timers in mind with the course of the time.
You can just mouse over the enemy summoner when viewing the scoreboard to see whether he is running the mastery or not. Another dead giveaway is if the enemy uses the cookie mastery.
I didn't know you could do that. Will give that a whirl. Thank you!
As a bot laner it's also helpful to be aware of your opponents' summoner spell timers on
Thank you for the point about keeping track of the timers on the summoner spells for both your lane opponents and your laning partner if you are duo lane.
Aside from marking the timers in chat, any tips for keeping track of all that information?