Saruman and betrayal

[Saurreg]

I think the question or not Sauron would go to the aid of Saruman could be answered by part if we can come to a consensus on the the characteristics of Sauron the entity.

Was he a primeval dark deity of chaotic evil in which blood and destruction was the ultimate appeal and desire? Or was he a quasi-ominipotent entity of conscious sentience and logical thought, in which he had a plan and was working to it?

If he was this blood frenzied god of destruction in which chaos, death and mayhem were valued above all else, then quite frankily I see no reason for him to aid Saruman. The provisonal result of Saruman being isolated and defeated early, leading to a tougher struggle by Mordor to overwhelm the free people of MiddleEarth would be greater bloodletting from both sides - which would appeal to Sauron more than ever since blood was what he existed for. The blood of Saruman and his Uruk Hais was libation. The blood of the free people that defeated and laid siege to Isengard was libation. The blood of his orcs and eastern allies in the greater-than-needed-intensity of subsequent meat-grinding assaults on the west would be libation. The more-than-actual bloodletting of the defenders would be libation. To sum it out, this Sauron was a creature of the moment in which the end was death and destruction and that the means were the horrendous violence of battle and needless sacrifice.

But the Sauron that we read from the chapters of Akallabeth, the Rings of Power and Lord of The Rings was far from a slave creature of the senses and unbridled chaos. He was immensely cunning, devious, patience, thoughful and above all never lost sight of his ultimate aim. He was as I would submit, a master strategist of the art of maneuver - the quintessential Machiavelli of the books.

In the art of maneuver, the strategist aims for maximum gains with minimal expenditure. He choses to face an enemy at its weakness whilst avoiding its strength on a battlefield and time of his chosing. And one of the hallmarks of great manuever is the ability to create a second front and deal the enemy with a blow that would weaken him so that his defeat was eminent when the time came for a general engagement with the maneuverist. Saruman was that second front Sauron was counting on and the greater destruction the former could exact, the better it would be because the enemy would have to expend higher amounts of resources. So it would be logical for Sauron to come to the aid of Saruman if the act of assistance is outweighed by the benefits of Saruman still in the game and able to exact a dreadful toll on the enemy. In this case the end justifies the means.

So what would have happened if Saruman's forces was not subjugated? I can forsee the destruction of Rohan and the eventual attrition that would wipe out the rogue Istari and severely cripple the rest of the West. Sauron then unleashes his full might while the free people were still weak and simply overrun them.