Just wanted to throw my 2 cents into the ring on helping people who are having issues with the RT combat. My roommate loves everything about the game BUT the RT combat. Not because it is bad combat, but because he is very very bad at it. I had little difficulty until level 10 on normal (with 1 major, spoilery exception lol). I, however, know I could never handle hard mode. But he was having serious problems with normal and was still having issues on easy (which he VERY grudgingly switched to).
My advice to him was this. It is ALWAYS easier if you can get a monster alone. So run. A lot. Make sure you always know how to back up (check your map a lot and just learn the easiest route from where you are to at least 2 major rooms back). Then, when you hit more than 1 monster, take off back towards the way you came. Try to make sure 1 of the monsters is following, but with few exceptions, that is rarely a problem. 1 monster will follow you pretty well. But any monsters behind him will get backed up. When the first monster moves, the second monster doesn't move at exactly the same time (most of the time). This causes the second monster, and any subsequent monsters, to end up falling behind. And if you run away far enough, eventually, all but the 1 monster you are kiting will have given up and gone back to their natural habitat. This is especially true in 1 wide hallways and generally happens very quickly if you can lead monsters turn a twisty one.
Once you have a monster alone, find a nice 2x2 area (a square of 4 blocks) and get it to where the monster is diagonal to you. Then...wait. See, excepting the charge attacks of 2 of the monsters, none of the monsters can do damage to you while they are moving between tiles (and if you follow this advice, the charging monsters will never be charging while you actually fight them). But you can damage them while you move, so you have the advantage here. Keep turning to you are facing the same square the monster is facing. When he eventually goes to move into that square, strafe so that you will again be diagonal to him. But, right after you strafe, click any one weapon. This will almost always land a single hit on the monster without putting you in ANY danger. You will both end up diagonal to each other, so he can't counter attack. Eventually, you'll get better at it and you can swing 2 weapons at the monster every time it moves (although that is about the limit if you want to make sure you're 100% safe, maybe three with the slower enemies).
This is a long, slow process (especially with some of the higher hp mobs) and is not fool proof (it can sometimes be hard to tell which was certain monsters are facing, some of them can strafe, and occasionally you'll run into rooms where monsters respawn, totally invalidating this strategy). But most of the time, this makes combat REALLY easy. This tactic will, in turn, make you better at the whole circle dance in general, without making you reload saves over and over and bang your head into a game-over-screen-shaped-wall. It REALLY helped my friend. He is still playing in easy, but he is doing much better, dying a lot less, and generally enjoying the game a lot more.
I hope it helps you too. :OD