Support Blitz is where it's at. You get to stomp people plenty, and assists are good for gold. Passive supports may be effective on good teams, but aggressive supports stand a better chance to carry a weak team.
Flat armor reds, flat armor yellows, mr/lvl blues, GP10 quints.
0-9-21 masteries, get that GP/10 and mana regen.
Flash and heal/exhaust.
Start blue crystal, ward. Rush Tear (only 595g when you start with blue). I usually try to pick up an early Wriggles Lantern for free wards, damage, and sustain. Heart of gold>either upgrade, aegis, boots>merc treads, sheen>triforce, manamune. In whatever order you think is appropriate at the time.
Wriggles on support bot? 1 GP/10 item = 30 gold/minute. 1 ward costs = 25 GP/minute. Close.
But with Wriggles on blitz you get everything you need: armor vs that pesky enemy ad carry, lifesteal for sustain, bonus damage to monsters for quicker dragon pickups. Plus the knowledge that you don't have to B at full health during a push just because you're out of wards. Try it.