1.In first place he can't be killed The mother can no matter how many times the mother would kill him he would just respawn until he kills her.
And she'd just keep spewing out new Darkspawn making that task ever more impossible. That's a stalemate, not a successful plan of action. Bashing your head against a wall might break it eventually, but its hardly the best way to renovate your living room.
2.As i said you can possess your enemy and off him/her ,or you can possess your ally pointlessly offing your ally when you could off your enemy , if you see that as necessary sacrifice well...
And I've thoroughly explained to you the reasons he might not want to off the Wardens. Screech "enemy" all you like, it isn't that simple just because you say it.
3.They aren't they are still there , there are disciples that warden didn't fought on architect side and even possible mother side one way or another wardens will hunt on them as they are around and possible even may continue his plan.Not to mention as i said grey wardens knew about architect for at least good 20 years it didn't seem bother him too much.
We destroyed his base of operation in the silverite mines and every disciple we come across save the messenger is inevitably killed by us or the Mother's forces. Whatever forces he has left at that point are minimal, scattered, and leaderless. With the Mother and the Architect gone, the threat is considerably reduced.
4.<Cries> If he could change bodies like corypheus he just could possess the warden when the warden killed him and leave his body there so it either looked as the warden or mother forces killed him , omg architect killing himself... pls as i said guys just use your head it isn't hard.
I'd ask you to do the same. The Architect can jump bodies when he's killed. He didn't jump into the Wardens because he didn't want to. He considers them to be in pursuit of the same goal, stopping the Blights. He doesn't consider them enemies.
5.Oh god, apart from the that his plan in the calling was completely different to his plan in daa ,we are not talking about wardens we are talking about the warden commander who flat out refused his plan and killed him and outright was threat for his plan...
And? The point is that he clearly doesn't think opposition to his plans make the Wardens his enemies. He's not driven by vengeance and seems to feel the Grey Warden attitude towards his kind is justified. He thinks of them being on the same side as him. They attacked him back then too. That didn't stop him from reaching out to the Wardens when the Mother went insane and he needed help.
And besides, when he's "dead" the Warden Commander ceases to be a threat.because he thinks his plans are dead with him. They simply go their separate ways, no harm done.
6.Expert no simple logic if his ability isn't automatic he simple dies because he have no idea about it and he can't use it , if his ability is automatic and he has choice .then we come back to simple choice finish off your enemy or finish off your ally .Also corypheus already proved that he could chose his target so it is out of question , also corypheus did that before his death.
Just because its automatic doesn't mean he can't choose. He might automatically find himself in a non-corporeal state, between living and death, confused, but not quite dead. So he follows the taint to the most welcoming presence, Seranni. Or Utha's corpse if he can.
"corypheus did that before his death." what on earth are you talking about?
7.Corypheus could do that even while not being conscious if architect had such ability he would know it as it seems as natural ability not something you learn.
Just because its "natural" doesn't mean he's aware of it. He has no idea what he is, why would this be different?