Work in progress
Progression:
Hail Borat near the zone-in for quest information and trade-ins. The progression through The Devastation is getting your Underfoot Touched Hero Stone Rk.1 up to Underfoot Touched Hero Stone Rk.9
To do this, you kill mobs in the zone getting Devastation page 1 through Devastation page 8.
You can loot them at any time, but can only upgrade your charm in order.
To upgrade, have your Underfoot Touched Hero Stone Rk. 1 (or whatever rank it is) in your inventory (not equipped) and hail Borat. Click [Charm] and then click the button next to the next rank of stone, it will upgrade it.
The page you need in inventory along with the rank of your Underfoot Hero Stone are like so:
Underfoot Hero Stone Rk.1 and Devastation page 1 results in giving you Underfoot Hero Stone Rk.2
Underfoot Hero Stone Rk.2 and Devastation page 2 results in giving you Underfoot Hero Stone Rk.3
Underfoot Hero Stone Rk.3 and Devastation page 3 results in giving you Underfoot Hero Stone Rk.4
Underfoot Hero Stone Rk.4 and Devastation page 4 results in giving you Underfoot Hero Stone Rk.5
Underfoot Hero Stone Rk.5 and Devastation page 5 results in giving you Underfoot Hero Stone Rk.6
Underfoot Hero Stone Rk.6 and Devastation page 6 results in giving you Underfoot Hero Stone Rk.7
Underfoot Hero Stone Rk.7 and Devastation page 7 results in giving you Underfoot Hero Stone Rk.8
Underfoot Hero Stone Rk.8 and Devastation page 8 results in giving you Underfoot Hero Stone Rk.9
Once you have your Underfoot Hero Stone Rk.9, you have completed your Tier 10 flag!
The other pages (like book 1 - page 1, etc.) are for the Epic 4.5 quest, also done with Borat in a similar fashion. Hail him and click [Epic 4.5] to follow the dialog.
Collect all 10 pages of 10 different books. You'll want lots of empty bags for these collections, but you can do parts out of order (e.g., book 3 first) as you get enough for 1 book. Speak to Borat.
At completion of all 10 books, you get Book of Epic Devastation, and that will get you your epic 4.5.
(More to come later)