...a Guardian could see some appreciable use out of it (Missing accounts for ~4-5% of total DPS loss so bridging that gap can account for more; even so, I would still opt for Strength rather than Accuracy for a Guardian since Strength is both a mitigation stat, thanks to Blade Barrier, and a threat gen stat).
Generally true, but I decided to test Sonic/Blade Barrier a week or so ago and took off half
my gear entirely
and it took the absorption down from ~950 to ~850 and most of this would have been the set bonus loss so the amount gained by strength is still negligible if any. The amount absorbed still seems at least relatively static, and I would like to see some actual proof of the supposed formula that uses force healing (or for that matter an log in which a single barrier absorbed more than ~1000).