Duskblade might as well lose the time period for the extra damage

There's no point, the time limit is so long and resets so easily that I can have a dude chasing me for so long and still get the 'surprise' bonus

It lasts for like a year while visible and it resets instantly upon your victim leaving a bush.

No im serious. If your victim goes into a bush and you follow, as soon as he leaves the bush he loses vision of you. As long as you are slightly behind him, you get the surprise bonus again.

No, it should be at least 5 seconds outside of vision or 1 second of stealth. And the window for getting the damage off should be 2 seconds.

If you cant hit someone within 2 seconds of being seen, you are not an assassin and shouldn't be using this item.