Hmm not sure about fast armor recovery being what AoL does, but I can check some videos. From what I've seen each successive Arc Blade attack brings the shield/health bar down progressively. It doesn't drop then increase then drop etc. But like I said I can double check a video or two, always good to double check things. Might be tricky to find an example where the Defender wasn't wearing Saint helm since that obviously blinds you so you can't see the health bar.
Even if it is progressive, the way overshield works in this game is actually not quite as straightforward as most think.
Not only does the person with overshield has more overall HP but they also take less damage (two different things).
This is easily evident when you use a sniper on someone who has a revival shield. My sniper does some 320 damage on a headshot which is enough to kill anything without a shield. When I try to revive snipe my headshots only do about ~220 damage and it leaves them with some health left, despite the fact that 220 is higher than a guardian's health...which only leads to 2 conclusions:
1) The overall health is increased (as evident by the fact that they can tank a shot with 220 damage)
2) The damage I do is less (as evident by the fact that my sniper headshot does less damage)
So maybe your arc blade is doing considerably less damage when trying to hit a titan.
Just another day in the crucible.
That lag.
I believe the reason why he didn't die is because he got hit (in his game) when his health goes zero..but the explosion happened at the place where it did on your screen...which was a bit far away from his position when you can see his health go down and as such he doesn't gets killed as the game thinks he is far away.
Weird shit.
I also don't understand people who teabag, yesterday there was a guy who killed me once and teabagged me despite the fact that we won all the games until round 4 and I got him every other time we went head to head.