This covenant can frustrate people who approach it like a duel or invasion, but it's a lot of fun once you treat it as a different style of play. Free aim the spear fragments towards pillars/walls to make long chains to isolate phantoms for a kill or create space so you can buff/heal, attack anyone who is going after the guardians to keep them alive as distractions and for their healing miracles, and treat the homing knives as stunlock windows you can capitalize on with a distracted phantom. Also as the phantom number adds up your player buffs go ballistic - eventually you can have hyperarmor with a friggin' dagger. When the phantom number is high take advantage of their overconfidence and your massive poise and focus on killing whoever is the weakest link. You don't lose your buffs when they lose a phantom, so the second you cut their numbers you've tipped the scales massively. Kill two phantoms in a 4v1 and the match is essentially over.