I agree with most of the stuff sitnaltax said, except about Warlords being weak. Yeah it's true that 10 mana for 1 DP is really wasteful with most classes, so you should view the glyph as Drac piety.
But. Warlords use it differently and they can save resources with it too. On my Warlord run I was lucky enough to get both wards so I never ditched Patches, but only Soul Orb was necessary. My only good glyph was Gettindare, and never noticed any antisynergy.
I generally fought like this: killed 1st target with resists and Gettindare, but instead of healing up I killed my next guy with DPs and Gettindare and benefited from +30% attack the entire time. Explored to heal both bars, for the 3rd target I used resists again. And so on. It saved tremendous blackspace for me.
Most of the time I received mana from Patches, which would annoy everyone but a Warlord.
I moved to MA very early but Taurog could have worked as well (you cast stuff rarely but in big mana chunks), ignored MB but something so meaningless like Magic made me stronger.
No enemy was hard. Warlocks went down in pairs so I didn't spend health on them, Meatmen hit weak enough to be regenfought with ~50% HP, since I was casting Getindare a lot and had huge damage barely got weakend/corroded. Cydstep let me ignore curses.
Funniest thing is for the 9th sub I joined TT and my damage was so high I could 2 shot things and generated piety under him
And there's nothing as scary as a dodging highly poisonous Warlord. It was one of the classes I could have won with without sanguine (I took it only for the damage). You can imagine how much blackpace I saved by the countless things I only found during/after the boss fight:
http://postimg.org/image/kbfhxombx/I'd like to mention other really good VGT classes:
Assassin - you have situational first strike so you can combat manaburn/poison better. Keep the Apheelsik for lategame and never regenfight with it early, but late you will be able to pull stunts like posion snake heavily, poison manaburn guy lightly, kill the mana burner, heal up and kill the still poisoned snake - ding. If you take a trip to Binlor, you can also hurt bad guys with indirect knockback, keep them poisoned while you only punch a Meatman. It's also nice to be able to remove curses even with a Platemail on.
Wizard - Supreme utility due to being able to keep every glyph. You could even scum for your preferred glyphs with him, I find it unneeded. Doesn't care about Taurog's max mana removal much since he's very effective with every glyph.
Half-dragon: you spot targets easier, and knocking guys into walls does really high damage. Should start with Binlor instead of Tauror, Endiswal helps a lot in positoning and Pisorf can place guys if you lack Weytwut. Dual damage means nothing can soak your hits well. KB counters blinkers and removes 2 DPs/hit. Horatio will be saved fro your KB, but HD is the guy who can always strip resistances with Stone Form.
Transmuter and Crusader for obvious reasons.
Yes Lujo, you can prep a god in VGT. I do it with Vampires too
. I ran into both PM and Taurog pretty late. An important trick to make note of is to 
). Dracul is, as everyone already knows, bloody 
