Speaking strictly Solo Queue Ranked.. I'm currently Plat top 50, but to be fair Guardian in solo is really a low Tier1 Plat kind of class at the moment. Right now Trap Burn DH feels a lot stronger than any Core build. A lot of it has to do with DH ability to remove itself from combat with Wings F2 and Trap's stealth. The same goes for Trap DH power variants. I use burn because I never liked Power DH... like, at all lol. That and burn burst builds have the potential to carry soloQ a lot easier than Power builds.
**The build I currently use:** http://gw2skills.net/editor/?PWABs2x7lNwaYOsO2IeMXbtMA-zZx8MSQFkpUQhDA
You really need to be at the right place and at the right time with this build because it doesn't have a whole lot of stability or stunbreakers... so if you know a burst is coming, trap and fly away like a bird with F2. **Renewed Focus** is a must... I don't like the randomness of Dragon's Maw and renewing Virtues is a big woop.