Vambraces of the Fervent  

BEFORE you do the quests, hook up with an orc hunting group just inside the zone from Kith. Just killing the orcs will raise the guard (also citizen, I believe) faction. Let your group know you are KOS and need scalps, and they will probably let you have them. If they don't they may sell them to you. Once the guard faction is high enough, then turn the scalps in to the guard captain who is usually located over the stone gate. This assumes you enter from the kith forest side. If you enter from EK, just substitute Gnoll for orc, and the same applies. With the exception that it is possible to solo effectively on the gnoll side, and very difficult on the orc side. First, the gnolls are lower level, they spawn slower, and spaced out more, and if you do need to zone, it won't be back into Kithicor. If you try soloing on the orc side, watch the clock. Don't zone at night, unless you are definitely going to die, as someone may be training an undead cleric to the zone, and you'll die anyway.

Speaking of trains, watch out for guard/citizen trains to the zone. Other KOS players may bring on a whole horde. If this happens, zone fast, before your group gets involved. That's a quick way to get uninvited from the group. Try to stay toward the zone side of any melee, and have your casters try to keep an eye open for guards. They don't patrol outside the stone gates, but can be trained there.

The scalp quests are nice, since they raise guard, citizen and merchant faction in Highhold pass. They also raise Freeport militia and Corrupt Qeynois guards, without lowering any other factions.

By the way, to test quard faction, try to con the captain above the gate. You should be able to target him from the pass, before you get in aggro range. If he's not there, the Volunteers, one inside each gate, also seem to be on guard faction, and if you aggro them, you can easily zone before being hurt very badly (or at all). Do not kill the volunteers as this will negate any gains from killing the orcs/gnolls.