That person must have the top bow in the realms because I had a barb pal named Mosk which has like 206 bow shoot me fully aimed none of us using any abilities nor burden or hinderance and he was missing me he has like 30 agility I have 37 reflex and 272 evasion. He shot multiple times too so wasn't one time, I'm sure your friend can't touch me with that little bow as I'm sure I can't touch someone with that much more evasion than my bow, given bow skill while fully aimed is a said percentage of your skill so the higher the bow the higher increase in effective skill when you shoot. However, getting off a full aimed shot on something at level better or pvp isn't always that easy of a task except for survival primaries.

War Hawk Catullus

I don't know anything at all about sniping or backstab, but what part does perception play in defending against both?

Aldeberan, the Clueless Tog

Against backstab, perception reduces or eliminates the amount which their backstab ranks reduce your defenses. Against sniping, perception reduces or eliminates their chance of staying hidden (successful snipes don't get a power increase, just staying hidden). At least, that's how I've come to understand it.

~~~Krin
"Quando Omni Flunkus Moritati"
"Goblins ... aisle 6, Mycthengelde ... hunt smart, hunt S-Mart!"
"You whine like a mule ... you are still alive!"
"Call me Snake."