anti focus fire idea

If you are attacked by at least 3 champions in last 2.5, or 3 seconds, and incurred over 2000 (true damage before resistances) in under 1.75 seconds you get a yasuo like shield to help you escape. I find the margin of error is quite low in this game especially for front liners who might not get a follow up from team mates.

This shield has a 1 minute cooldown,

This wouldn't affect assassin so long as team mates did not also inflict damage to said target. Assisting you with heal does not count.

Not sure about the numbers, would need testing to see what's a good value.