I've since pushed the shamans and paladin to 34. I haven't finished setting up all their abilities yet (had some alliance friends who were pumped to have a multiboxer for wrath, lol - powering the CRAP out of me) but I've since furthered my goals for how I want the controls set up:

1) I need to be able to maintain as much control as possible over the toons. That is to say, I need the ability to react to situational problems as they arise and without having forseen them. In PVE, I throw myself recklessly around because I *know* it's going to kill me, and I want to survive it. A pull gone bad is where you see someone's true skills in PVE, in my humble opinion. I like to know even when things go bad or otherwise not according to plan, I can recover from them. Thus, I need a high level of control and access to things that otherwise wouldn't see much use. Another reason for this is (not that I see it being very arena valid) I do like PVP and will throw almost anything into the BG's or at someone on the world map, and I hope the paladin-shaman setup makes PVP more interesting for me in that regard.

2) I do not yet have any additional keys over the standard keyboard. A friend of mine is coding a modified, custom keyboard driver for me - so I can plug in a second standard keyboard to one system and use it's numpad & arrow keys as extra keys, much like the X-keys (but a lot cheaper.) Of course, this means I'll have to find a spot for a third keyboard on my desk, but hey...

By this point, I've realised cast-sequence totems are a *MUST HAVE.* I have one macro for a totem setup geared towards PVP (IE, staggered tremors and plenty of grounding totems), and one macro for totem setup geared towards PVE in the same macro (using modifiers to keep two macros on the same button). However, I still will need some of these totems without prior knowledge that will have to be dropped immediately - such as Earthbind, Stoneclaw, or Firenova (handy anti-melee PVP goodness.) So I will dedicate hopefully no more than 5 or so keys to totems, total.

In closing, one of my concerns (and I'm not even sure it it's based on anything other than unfounded paranoia) regarding cast-sequence macros is that if, say, I put LB/LB/CL in a cast sequence macro and then I don't put CL/LB on their own individual keys, I won't have CL exactly when I need it - say, when I see the primary opportunity to CL a group of targets, or what have you, or when I need the lower casting time to hit a target that's running away - and that lack of precision in my choice of what to cast worries me. Does it honestly make that much of a difference in a PVP environment?