I do think Raidens lvl2 lasts too long... a couple of times I've even thought, ok, I've died, his level 2 is over, so I run back to the action, and I get killed again, because his level 2 is still going.
Sly can only get a 4th kill if he's lucky on a small stage. On the larger stages Sly can't even get across the whole stage before time's up.
I think I might take a stopwatch to these when I get home, just for haha's. Maybe it's just perception.
Yea, so Sly's level 2 lasts about 4 seconds, and Raidens level 2 lasts about 8 seconds.