Assassin cross ; I've just did some reasearch, hide and grimtooth couldn't last long either, they'll be dead in the matter of seconds ( or none at all because the one fighting them can decloak the enemy with a click ), reducing the skill delay is making the skill rather useless.
Clown ; I don't have to, you already said it was annoying , it's obvious that you're pissed and you think it should be nerfed, and your math isn't even right you're saying that clown does 5-6k on AV, well that's because most people default GR on their armor thus making most clown using shadow/immaterial arrow, it would be different if the one fighting them is using another armor, like Holy/shadow armor, that could counter clown, making the only choice available for clown to hope on tarot.
Stalker ; there can always be one in the future, we never know, again, nerfing the link duration might be better
Ninja ; You want me to read all your response? I'm only here to response to your suggestion, not to response on your response on other people responses, you didn't even read the rules when making this post, you're even thinking that every ninja would give the same damage, also, there's something called "cornered/walled" to fight against ninja + sight if you've never heard of it
Also , this is part of the suggestion rules ;
as far as i can tell your suggestion didn't even has any solid reasoning why they should be change, and again ^