Erika T wrote...
Polaris:-
Why I am convinced that Loghain's actions were premeditated:
1. The Orlais connection - no way he would let Cailan turn to the Orlesian empire
But a loss at Ostagar would only further convince people that they needed Orlais, particularly with half the army gone. Loghain trying to convince everyone that they don't need Orlais' troops by decimating the army makes no sense. If Loghain had won at Ostagar, that would have silenced a great many 'maybe we should turn to Orlais' voices.
2. He seems only too eager to prove that the wardens are not as useful/great as cailan thinks - that right from the beginning.
I think he
is a little concerned about their influence on Cailan since his experience with the Wardens (and Duncan, for that matter) leads him to think that they're Orlesian agents and he's already concerned by the way Cailan barely admits the occupation happened. Still, he doesn't come off as fanatically devoted to their destruction and even takes the time to meet with and encourage a random GW recruit if you stop by. Given that you're not even a Warden yet and he's the general of the army on the night before the battle, that's rather impressive.
3. I am not saying he intended to have the king dead (although possible) from early on. I think he tried to talk Cailan out of being in the battle. I do think he definitely wanted to betray the wardens, to show their uselessness to Cailan?
So Loghain doesn't like the Wardens and is convinced (with some reason) that they're Orlesian agents. Is that worth decimating the army? Hardly. I don't think there are more than two dozen Wardens or so in Ferelden at this point. If Loghain could have won the day, even if Cailan himself were absolutely convinced that it was all those two dozen Wardens who - while taking out more darkspawn than any individual non-Warden soldier - couldn't even remotely hope to match Loghain's army then most people would realize that it really wasn't. Betraying them at a later date, maybe, but the cost would not have been worth it then.
4. He definitely doesnt think Cailan fills Marics shoes. He wants to be regent himself.
Why would he? He doesn't think Cailan can handle it but Cailan is
hardly handling it. Anora rules and he seems to have complete faith in her. He does claim the regency once Cailan's dead, yes, but he's paranoid (and maybe rightly) that Anora will be replaced and that only he can defeat the darkspawn. Also, Loghain is noticeably happier once he's done being regent. He doesn't reallly like politics or his fellow nobles, after all.
5. when the two wardens are sent to light the torch, he seems suspicious. I dont know what, but something about his behaviour is not right. I ahve to play it again to analyse.
This is the part that's a little confusing. We're told that he wanted his own men or Uldred to light the beacon in case he decided to retreat because then they wouldn't light the beacon. I'm not sure exactly
how he would have been able to let them know whether to light the beacon or not but I guess that's just one of those things you have to go with.
6. He says "Cailans death was his own doing". he regrets it happened, but he knew it would happen, or so it seems to me.. thats what I think anyhow 
I don't see what's so suspicious about this. Had Cailan listened to Loghain and waited back by Loghain's troops then I have no idea what would have happened to him post-Ostagar but he would have survived the battle, at least. Loghain (conspiracy theories about him using reverse psychology to get Cailan on the field notwithstanding) did try to convince him not to fight on the front lines and Cailan implied that they'd had that argument quite a bit. That Cailan died at Ostagar was because Cailan chose to fight on the front lines with the Wardens.