Flameout is high quality omega 3's for sure, but I don't recommend megadosing them because it's a fragile fatty acid and thus, oxidizes quickly and can increase free radical damage. I'd just stick to 1-2g per day and use other stuff like glucosamine chondrotin, cissus, etc. for achy joints.
You have to realize that fish oil supplementation has been studied pretty extensively and despite what you might hear or read, the literature does not support megadosing it. We can't superdose omega3's to reduce the pro inflammatory cascade, as it's actually more important to remove omega6's.