He commonly uses a glaive (the idea is that he'll get attacks of opportunity but it doesn't always work. . . .)
That is normal - most the time, everybody counts AOOs in his tactics, including the NPCs. But sometimes, you can terribly surprise your initiative winning opponent when you get an AOO while you are flat footed. And there are many precautions to take when trying to avoid beeing "AOO"ed.

Sometimes I believe, players (myself included) are to careful with AOOs.
Reach Weapon are a good way to make Rangers broken, not shafted - get a wand of polymorph self, and polymorph into a creature (Troll, Giant) with reach. Okay, it is very expensive, but ... you have this option.
My current character already used this tactics from time to time - he is a ranger-fighter who has the Expertise Feat Chain including Knockdown, uses a Spiked Chain, Combat reflexes and is no completing the Dodge Chain...
For this character, Quickdraw would be quite useful, I just figured out - he can also use two weapon fighting with great benefit (he uses a Light Flail and a Shield of Bashing, and has the Shield Expert Feat), but switching weapons cost to much time.
In the last adventure, we were forced to go submerged, and I was polymorphed into a troll. I used a longspear as an underwater weapon - only enhanced by a Greater Magic Weapon Spell. As we reached a cave filled with air, a battle begun, and I would have loved to switch my weapons, but I needed the extra attacks to avoid the death of our halfling bard...