Firstly : 73HP from CS and 73HP from J. There's something wrong here. CS>J at all times. You're losing HP and thus TVs. REcheck the guides or install Revvo's rotational weakauras (>>find it here<<)
Secondly, your must align your 2nd guardian with wings+2nd potion. You had terrible luck with Spark and got it only once aligned with SW.
Thirdly, you misuse ES powerful synergy with feathers. You used it multiple times with only 4-5 stacks of feathers. Wait for the 9th-10th (depending if you have other bonuses fading bewteen 8th and 10th, then use ES with the most powerful str combo available).
On LFR, slack on trahs to have your rppm trinkets at max chance for procs on pull. And with your guild, if they are ok with it, wait 2-3min before pull for the same reason.
Last but not least : you have NO legendary bonus, meaning you haven't your second gem on weapon, no legendary metagem, no 600 cloak. This HURTS. get updated with this
TL;DR : change your weapon asap and enchant yours with dancing steel and your legendary quest, and refine your rotation/CD usage
Loonking at your tortos kill. Should have delayed your third HA/AW to align it with guardian+2nd potion. Bad weapon and weap enchant. NO legendary bonus.
On tortos specifically : align your CDs with turtle kicks except the CDs you blow on pull. You'll get better results.
Same problem with ES-feather synergy misused, and it should be macroed to your Synapse springs
TL;DR : change your weapon asap and enchant yours with dancing steel and your legendary quest, and refine your CD usage. Rotation looks ok
EDIT : forgot to say that none of you had t15 bonuses as ret. And they are a major boost, especially 4p, and 2p is very nice too.