User blog comment:B214/Question and Answers 6/@comment-26293136-20161029205102/@comment-9595671-20161108172208

I think a better way to rank it is the potential to kill a god, because the only one we know killed a god is the True Longinus which killed Jesus. Some of the high-tier Longinus are said to have power that could destroy the world as another example.

What I think makes the Boosted Gear and Divine Dividing qualify under Longinus is the fact their abilities can let them transcend a god in power like Rias mentioned. So it has the potential to do so, but neither hasn't actually achieved it.

Plus I don't see how the Sephiroth Graal can actually kill a God, much less anything else. Out of all the Longinus is seems to bemroe of a defensive/supportive type gear, more like it's meant to defend or survive against Gods, unless you think of it reviving an army indefinitely.