hard to tell cause the prices of everything is going down, if you do 5 hard bosses you get minimum of 2.5b in gold bars tho so if you're fast at doing the bosses its still worth it
so far for more information and tested, the one got aim will get stun while bird is fly up, so see bird fly up can use / SA to avoid getting stun, how far the gap mark and you also no use, while bird fly up mean stun incoming.
There is a mechanic with the target where if it doesn't lock on and if you don't run too far away from him(I believe) he will say something like I focused on one person for too long. And get another dp debuff. I am not certain this is exactly how it works but it is another mechanic that's not explained anywhere really.
oh really, I ran from this guy for like a minute straight doing phase 2 never seen that, sounds like something hard to replicate since the mark seems to randomly swap targets sometimes even if im not doing anything