Guild Wars 2

I heard that they are very strong at solo and small group but weak when zerging. Is it true? And can anyone show me which build is good for Wvw pleaseee? XD

You’ve heard correctly.

Small scale, any of our condition regen builds work. So: traps, spirits, or beastmaster.

Large scale, your best bet is likely to go traps. Or survival skills with muddy terrain and binding roots. Then probably main hand axe, or great sword for the AoE and cleave.