just a thought, for mid levels (65-75ish in all stats) burthope guards right out front of the castle are really great xp and loot. just take like 3 or 4 cakes, and high alch stuff. there are only two of them outside, but they spawn superfast. there is virtually no waiting after you kill the 2nd one before the 1st spawns again. they drop lvl 2 Clue Scrolls too which is nice. and if this isn't a 10/10 guide i don't know what is. great guide.
good guide, but I've been doing all kinds of tt's for a while now and i decided that level 2's are the most effecient in terms of time and cash (and you actually get good xp too). You just farm them from guards, and if you can port everywhere and have the right skills and quests, you can be done with a TT in about 5-10 mins. just a thought... i think i'm a little partial to lvl two's since i got a zammy cloak and sold for 1.1mil. : )