You shouldn't need flash. Overpower will do the trick. Flash just helps in a pinch if you don't have time to line up a cone or are suffering from TP woes during fast paced pulling. You will eventually need provoke (lv 22 gladiator), but not until some full party / raid dungeons way later. Gear isn't very important for low level synched dungeons. Make sure you grab the lv 15 Hall of the Novice set though. It's easy to get, and very good compared to the normal quest loot. You also get a +3 stat ring with an XP boost up to level 30. You can get a gear set for each role (DPS, tank, healer), but only one ring.

I'm guessing your big problem is just not getting those two overpowers in at the start and watching to see which mobs DPS is targeting to land enmity combos on.