Healing wish is a good option on latias, but I personally prefer roost for the extra survivability. I'm not sure about scarf kyu-b tho, it requires a ton of prediction, and isn't as strong as the lo set. (Unless you are comparing physical scarf vs special lo) Thanks for the rate brah!Amazing team, dude! Had a lot of fun trying it out. Definitely recommend Healing Wish on Latias over roost/recover; it's often seen as a sort of HO choice but it happens to work quite well here, with Slowbro, Hippo and Volc all benefiting greatly from the free switch/second chance. MegaBurrito in particular is a patient setup sweeper who likes to check things early game and is totally boned by status--prime Healing Wish recipient. I also second the above suggestions to try AV Bisharp; while not the most optimal set in the world (anyone would want to run LO/Black Glasses and speed), this particular team reeeeally struggles with the latis and your current (rather inefficient imo) spread puts you in a million 50/50s where you'd rather just get off the guaranteed pursuit. AVest and enough bulk to survive double draco from LO Latios should suffice.
Finally, I'd honestly consider Scarf Kyu-B. Your matchup vs stall is fairly sound between crobro and Volc (who pretty much insta-wins on its own) and although it damages your balance matchup a bit, Scarf Kyu-B offers a nice buffer against offensive teams while still maintaining some wallbreaking efficacy. It may prove itself deadweight in many games, but at a certain point you're honestly just stacked against defensive teams. All that aside, it also has a decent surprise factor and (when running Iron Head, since your Bisharp doesn't) gives you a decent Fairy killer in clutch situations.