New Tank facing many challenges... need advice.

[cheolsu]

he isn't. i just object to how it was setup with blue gear vs grey to come to the conclusion that item level is a lie. as a matter of fact, 270 poetic gear will last a person to something like level 67 before the dungeon gear starts being better. still, if you've spent all your poetics, i recommend picking up that 115 gear to fill the rest of the slots

[Metalwrath]

The problem is the way the dungeons and trials sync the gear.There are major differences in ilvl that players will get synced to.For example at lvl 50 content it will be synced to the maximum illv at lvl 50 for a lot of the content.If you are a new or returning player this can be a big problem especially as tank.What this basically means that their gear could be synced to atleast 30 ilvls or more higher than yours depending on what you came back to game with or what you got as a new player.
I came back recently msyelf and noticed the difference with fist of the son alex.Where when i played before tanking in ilvl 220-230 was perfectly fine and good gear at the time to run it.Since then there were many ilvl increases at lvl 60.So end result is i had to tank against lvl 70 dps who got ilvl synced to around ilvl 270 which is an enormous difference in stats.
Like people have said the best you can do is buy higher level gear or aquire it through tomes.