Like many before me i would start by saying i don't disrespect fm cook or fletch. Most of the people who disrespect those 3 skills have experience comb and skilling. When u switch from comb to skilling, you notice a huge difference in xp especially compared to those 3. The difference in xp is even greater if your are training comb with slayer as many do. There is no point in trying to gain respect to the 3 capes by using the method you proposed, since most players will train all their skills on 1 character using money from comb or other methods to train another 1 of their skill. Another thing is the risk involved, in training comb u risk death whereas training the 3 skills that were mentioned does not expose your character to much danger apart from a few randoms. Among the 3 skill, fm is the most tedious as u must do 2 clicks for every log to burn. It is true that skilling is repetitive as u cook, fletch and burn the same thing over and over again. But then again so is comb because if u want the best xp only 1 monster will give u that. As for who would win between a pure comb (att,str,def) and a pure skiller (fm,cook,fletch), i would say the skiller as making money to get the raw materials is quite easy. The comb pure would lead in the beginning but will be overtaken once the pure skiller has acquire the raw material and the lv require for the best xp.