Build critique please for Hammer?
In WvW, after your shelter and renewed focus are used up, you’re probably going to die very, very fast.
You’re going to have to find a way to keep yourself up (maybe more defensive skills you can cycle through, like focus or more regeneration, protection) and deal with conditions (even if it’s just melandru runes and -condition duration food). I think you should plan that people are not going to be in your symbols most of the time.
I wouldn’t bother with Bane Signet and Retreat. There’s tons of amazing guardian utilities that can impact a fight. Those two aren’t really it. Same thing with your rune sets.
Staff’s basically a support guardian weapon rather than someone doing DPS, like you’re trying to do. I’d change that to a different weapon set.