A couple of quetions for you?
If the others are the goal why not attack them? 20 good bolton men sacked Stannis' base, so 5000 good Stannis men could win the whitewalker war. Stannis still seem only interested in winning the Iron Throne and Jon is the guy focused on the white walkers.
Why doesn't Stannis sacrifice himself? He could instruct Davos to carry on war as regent.
Can Stannis win a battle on his own? In other words, why does he always have to use a cheat code in life (such as when he killed his brother).