You should use your extraordinary armor already because then you have better gear for dungeons and think like this
Extraordinary Armor Normal Armor
+50 Gear +20 GearIt’s my opinion and i don’t die that often :)
2.You should save it because maybe you are in a dungeon and don’t want to run to the dungeon again and reviving in the dungeon (or where ever you die) costs 40 and at the exact same place costs 120 andermant.
3.Take what you think is good . For example if you don’t have that much gear you should do dailies like "Finish 6 Quests " or “Kill 30 worthy Monsters” , because if you have bad gear you shouldn’t go for pvp because there could be dailies like " Kill 45 worthy Players" or with luck “Kill 3 worthy Players”.
But it’s really up to you and even if you miss 1 time the extraordinary gear because of pvp then you can still get ancient knowlegde or 20 silver or whatever :).
I hope i was able to help you and have fun playing , maybe we see each other sometimes ingame :)