1) I picked up Treads of the Wasteland because no one else in the raid wanted them and they have enabled me to change Hersir's Greatspear HC to Oathbinder. If I would be able to obtain Returning Footfalls the the most optimal thing in my opinion would be to gem for hit in yellow sockets however I would have to use 2x20Hit and 1xAgi/Hit unless I would also be able to obtain the heroic token and upgrade my gloves with it, then it would be 2x20Hit. I also use +40ArP buff food which with my current gear brings me to 1395ArP. As far as the enchant goes I felt that during farming the content the additional +8% speed from Cat's Swiftness was not needed.
2) I used my cooldowns during DBW proc and not during BL because it was impossible to tell when it is going to be used and if the fight would last over 3 minutes or not. Also didn't double pot since it is Toravon. As for Chimera shots I did not have Serpent Sting up at all the targets I have used it on because the orbs managment was very chaotic. It was not really my intention to show that combatlog in my guild applications but as far as 25man goes that is the only one I have at this moment and still can't find a decent ICC25 pug. All my damaging attack macros have Silencing Shot and Kill Comand as well as the Auto Shot trigger. For my cooldowns macro i use:
#showtooltip Rapid Fire
/cast Berserking
/cast Silencing Shot
/cast Rapid Fire
#showtooltip Readiness
/cast Silencing Shot
/cast [target=pettarget,exists] Kill Command
/cast Readiness
I use potions and Call of the Wild manually.
3) I do carry glyph of Kill Shot in my bags but
www.femaledwarf.com has shown a minor dps increase with glyph of the Hawk compared to glyph of Kill Shot when I simulated it for the last time. I always use Kill Shot when the fight under 20% is especially important like Putricide or Sindragosa.