Well, after a month of going out to random places for a few hours a night after events. Guarding is finally 354. Haven't had much room to test it yet besides when I was skilling. For anyone looking to skill their guard heres a summary of tactics.

LVL 75 __ 190 - 240 guard skill - The Boyahda Tree - Black Mandies
LVL 80 __ 240-285 - Abyssea La Theine - Hadal Gigas
LVL 85 - 90 285 - 354 Abyssea Altepa - Mandies, Abyssea Attowha Mandies/chigoes (whichever camps were least occupied)

Atmas - Mounted Champion, Savior, Sea Daughter
I had some help on the mandies in the boyahda tree but did the others solo. at 80~ the Gigas in la theine start off IT but after you kill a few they drop down in level usually. /DNC whenever I was solo, Sea daughter helped stay alive and Chakra along with atmas gave a decent cure boost when I overpulled. Tried the different skill up foods and have the skill up ring. Can't tell you if it made a difference or not, but I'd like to think so. I chose to skill while I leveled up so evasion stayed close to guard skill. Occasionally I reduced evasion merits since nothing else to use merits on. A friend took his pup and RDM mule out and skilled solely in altep and got his guarding to 290 that way but he had about 15 mandies on him at a time. If you have the means to do that, go for it. He went from 200-290 in 2 days. Start with small groups if you're solo and work your way up to see how many you can handle at a time. Know when the mobs seem to be a little more inaccurate and take off some gear accordingly like boxer's mantle. Abyssea mob levels vary widely so be prepared accordingly and take notes on what the mobs con as you pull them in and what seems to be giving you skills the best.

Side note: Started on parry skills more vigorously. I would have to say this skill seems much harder to skill than guarding. Anyone with War leveled can get it to 290 fairly easy by /DNC pulling loads of mandies and skilling up weapons with pretty much the same atmas. But once it caps for war it seems to be a little harder to work on. The jobs with the better parry skills have the defensive skills of paper. DRG and PLD are durable but cap at 310 I believe. I tried Sam/DNC seems to be ok but evasion noticably higher and mobs miss 15 times to every 1 parry and you'd go 20 parries before ever seeing a skill. Tested atma of the roaring laughter, it seemed to help with parrying more and evading less but skills are still far apart. Parry Skill 316 as of August 20th. Hope this helps anyone looking to cap there skills.