Interesting topic... In my opinion, you can't say one particular level is high for all skills. For example, level 80 in runecraft takes a much longer time than say level 90+ cooking. So it doesn't really make sense to say that only skills at level [insert whatever level you think is high] or above are high when for certain skills that fall below your expectations for what is high take more time/effort. In other words, each individual skill should have its own point at which it is considered high. As for combat effects on determining what is "high"... I would answer yes and no, depending on the skill and combat level. For many noncombat skills, I agree with you that combat has no effect whatsoever on how you go about training it, but look at other some other noncombat skills where having a decent combat level would make it easier. Agility for example, is way slower if you tried to train it as level 3, because of the fact you only have 10 hp and you don't have access to many of the high level agility courses such as ape atoll. Slayer is also a noncombat skill, but combat certainly plays a major role in it. Many quests (shilo village is one example) unlock more efficient areas/techniques for training noncombat skills, and many of these quests have some sort of combat requirement. So for skills like agility and slayer, I would say combat level plays a major role in what you would consider high. As for many other skills, combat level plays only a minor role in determining if its high.