Ok, since I first responded and mentioned AEing, noone seems to have explained it. (sorry, i wasn't following the thread)
To learn AE kiting, pick a place where its easy to learn. HoH (only up to 10 mobs) or Valor mebbe. Heck, you can do this on the hoppers in DSP as well. (and that's the best way to clear the cave if farming for pelts... @#!@# Tailoring.)
You want to gather together as many non-summoning, non-casting mobs that you can. Run in big circles to pack them into a nice tight bunch. You then want to turn selo's OFF using only runSpeed3. Pick up a Lute, and sing AE songs. You need to make smaller and smaller circles so that the mobs are JUST out of melee range, just inside AE song range. Twist AEs until mobs are dead.
In Fire, try near the entrance at first. There's the zone if you need it. At some point, you'll probably head to C2, and that's all red mobs. I typically only sang MoM and Denon's Bereavment. Its only 2 songs, i realize, but with the resists you WILL get, its good. I'd gather as many non-casters as I could, which can take some time splitting all the casters out. Pack em up nice and tight, plop OFF selo's, lute, and run small circles.
notes - In Fire C2 - the mobs are going to be VERY close to you. you'll be a couple feet out of their melee range. Also, D/B and MoM don't have the same AE range, so sometimes one will hit, the other won't. Since 2 mobs there can melee you down almost instantly (unbuffed) it hardly matters how many mobs you have. 2 mobs is equivalent to 30. You mess up and one hits you, they ALL will, and you'll be looking for a rez soon enough.
Like I said. Try playing round somewhere easier first. DSP hoppers are good (good pelts for tailoring) or almost anywhere there's no summon/caster mobs. You can AE kite indoors, because you're relying on RS3. (just need to collect mobs, and have a place to run in circles)
You really want Extended Notes 3. Some mobs have greater melee range.
On exit route: Well, there IS an exit out of fire once you've crossed the wall, but it sucks. Inside C1, there's a door that takes you down a cave tunnel to a lava pool - and has see-invis mephits at it. If you can Selos' / DA into the lava, swim a good distance through lava (have high FR, it hurts) you'll make it to the mephit islands where the lava-tube exit is. If you can get away from the islands, you're home-free, and just run to zone then.
Hope this helps!
Skrabian