AHC: Prevent Disaster of (Post) Manzikert

With no PoDs prior to the death of Constantine X in 1067, how do does Rome hold onto as much territory (that OTL it lost to the Sejuks) as possible? I'm specifically looking for them to hold on to enough of Anatolia that the First Crusade (at least as it came about OTL) is effectively prevented. Some specific options:
  • Eudocia marries someone other than Romanos IV (who?)
  • the battle of Manzikert doesn't happen (how?)
  • the ERE wins the Battle of Manzikert (how?)
  • the Turks still win, but Romanos escapes capture
  • the peace deal between Alp Arslan and Romanos holds (how?)
Which of these PoDs is the easiest and surest way to meet the challenge? Or is there a better one?
 
Manzikert happened precisely because Romanos needed to shore up support.His support was declining due to the Turkish problem not getting solved.That and because Alp Arslan had no way of keeping his word and no real way of preventing his people from raiding.
 
Yeah, I don't think much of the post-Manzikert debacle is on the personal failings of Romanos. He wasn't incompetent, just a man forced to do too much with too little, and without enough genius or luck to produce a miracle.

Romanos escaping capture helps, but I'm not really sure it averts subsequent civil war, because even a defeat in which he survives is still going to be an excuse to unseat him.

An imperial victory at Manzikert is possible, and is probably what you need. Not because it will deliver some decisive blow to the Turks - it won't, they've got too many tribesmen to be checked by a single battle - but a victory that at least seems decisive shores up the popularity of Romanos at home. The post-Manzikert loss of Anatolia happened because of civil war, so to avert it you need to make Romanos as secure as possible so as to dissuade rivals, and a victory over Alp Arslan is probably necessary (but not sufficient) for that.
 
Ok, so we need a Byzantine victory at Manzikert; what's the best way (preferably w/ a late PoD) of getting that?

Is it Romanos knowing that his Turkish allies will betray him? Not falling for the feigned retreat? Or something else? (It's entirely possible I'm not remembering the OTL battle correctly here.)
 
Plenty of things went wrong for the Byzantines, notably half the army being missing having been dispatched to the Lake Van area. It couldn't be found when Romanos tried to recall it. In the battle itself, Romanos was betrayed by Andronikos Doukas who failed to cover the emperor's retreat. Neither event needs to have happened.

On the Seljuk side, Alp Arlsan's followers gave him no such trouble, but that might be changed. In OTL, Alp Arslan didn't have all that long to live -- he was killed while campaigning in the East only a year later. Reverse the order of the campaigns, and have the Seljuk army at Manzikert led by one of his sons instead. It's then easy to imagine that son being betrayed by supporters of one of his brothers during the battle.
 
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