Guild Wars 2

30 tactics ( increased longbow range,Empowerer allies,Vigorious shouts)
20 defense
and 20 str

Weapons: dual axe/longbow
utilities:Mending,Endure pain,Shake it off,for great justice,sigil of rage

Im aiming for medium damage,alot of support and survivability.
Will I be any help in dungeons?Im not a fan of glass cannons because they lack survivability id rather do medium damage and have high def/hp.

Okay, so this setup you give will perform well, but there are some tweaks that will make it even better.Do note I give my opinion, and it may well differ from yours in what a dungeon build should be like,
First off, increased longbow range is useless(completely). I advice you to switch it to inspiring banners and put a banner of precision on the endure pain slot.
For endure pain – the skill is garbage at the moment.It lasts 3 seconds instead of the intended 5, and sometimes it bugs even further, and when the seconds expire, you take all the damage you ignored during the skill, but as a spike(which results in instant death).
Also, off-hand axe is sub-par in dungeons.You might want to switch it with mace(mace 5 is gold, and vulnerability from 4 is always good), or shield for more survivability.My advice is to pick mace.