So I get from this that it doesn't matter what your competitors CI is, you should just aim for these levels, even if the competitor has a ci of 80?
Globally, yes. I did face in GW3 opponents with CI 30 and CI90 on the same market(500-1500NM domestic USA lines), and there was not much difference between them. BTW, the CI90 did collapse, the CI30 is now at 40, and still thriving(while many companies begin to cough).
What makes a difference is the pricing policy. Against an opponent who does NOT wage a price war, you can safely increase your prices yourself, and everyone survives. When price wars begin, many players go BK, and go on crying about the fuel prices(hell, it's just 500$ now in GW3, could be 1700$.....).
Don'g get me wrong : in some situations, it's mandatory to lower prices(I had several monopolies on 140 demand lines with 1 737, and now, it's flooded with S2000, I had to divide ticket prices by 2 not to lose money on the line any more, 15% LF does not work, even at double price). But more often than not, players kill themselves trying to wipe out opposition through low prices. Or through excessive marketing. This guy that attacked me in Memphis was so : He had 120 planes or so, flooded Memphis with CRJs, and lowered his prices to 20/30% under the standard, or so(wild guess, compared to my then-CI70 and my own pricing policies). He wanted to kick me out, obviously. He had 2-3% margin, I had 16/18% margin. I could afford a price war on a secondary airport. Memphis was 40% of his flights, and I think that's where he died.
In other words : don't get obsessed by your opponents. Try to find the best price/image setting for making money. The agressors will die before you if you defend your area correctly - without excessive counter-attack.