first off I would like to say that blade powers seriously trump scion warrior powers even with the leader boost (especially if you want to compare warmaster powers to scion warrior powers)

second off you took the example of 2 super geared super prepped warriors which is hardly what we could consider the norm but all the same I bet igbah kills kostyan more even if kostyan manages to drive him off.

Third eveytime kostyan wants to push that fight he is likely to use up a lot of resources whereas igbah i bet doesn't need to expend nearly as many.

at the end of the day sure there will always be examples to the contrary but in general axe specs still hold an advantage over dexy people in terms of who is more likely to die in a toe to toe fight.