It's been a while since I played at 35 (I'm at 68 now), do you have Vamipric Touch yet? If not, no big deal...
I have a macro setup to deal SW:P, then VE, and it resets itself on leaving combat or switching targets. I find this makes me use VE every battle, and since it only takes, what, 35 mana, there is no reason not to use it. I'd go, assuming you have VT: VT, SW:P, VE, PW:S, MB, MF, then I repeat MB and MF as MB is available. Without VT: MB, SW:P, VE, PW:S, MB, MF, MB/MF repeat like above.
I find that if the mob is at least 2 lvls lower than me I can do away with PW:S to conserve some mana. Actually, it works that way with mobs up to my lvl, probably even 1 higher, but it gets much riskier. When you do get VT and if your wand is good enough you can VT, SW:P, VE, PW:S, Wand. The VT and SW:P will be enough to keep your health up (via VE) and it will save you on mana. Me, I'm impatient, so I rarely use my wand, but I spend a fortune on mana drinks (not potions).
Anyway, I'm sure there are better methods, but that seems to work fine for me. At 35 I'd imagine you could get 2-3 kills in a row before having to rest for mana. At lvl 68 I'd imagine I go 4-5 kills between needing rest, but I rarely solo anymore so I'm not certain.
I also want to add that the reason I start with VT (or MB) is because they are the longest cast times and I use them to pull, that way when I add my PW:shield I get the full 30 seconds out of it. However, when soloing I find that the time limit is rarely an issue, it's the mob taking my shield out before the Weakened Soul is up. So, it might be better to shield, THEN do the other stuff. If this is the case, I'd do the instant casts first: SW:P, VE, then the VT/MB.
Sorry for this mess of a post. It's my first time trying to give advice, and I see now that I'm entirely unqualified. Oh, but this I know for certain: Get the mod Decursive! It will make dungeons/battlegrounds MUCH easier!
Jeff
Chancresore, Guild: Uno, Server: The one that starts with Q.