I played through prophecies with my male ranger and okay it was fun. Two new campaigns later and eye of the north is coming out. I'm thinking of starting a female Ranger cos the EOTN armor is sick

Also, because I can't find many good varied builds to use on a Ranger, I find it easy and repetitive to use - Interrupt spell caster, attack with bow, heal if needed... Why do people say Rangers are hard to master? Should there be more to it than what I am doing?
thanks for your input on this