How do you feel about farming a mirror for the Wave Spear instead of dropping 1300 Soldiery on the Weathered weapon?
It will take you a lot longer to get that fucking mirror than it will to clear coil.
That thing is elusive.
Here are the exact reference values from my spreadsheet (keep in mind ACC isn't in the calculation as it is a mathematical nightmare and ACC itemization is dependent on drop RNG)
These reference values are based on an equation calculating the stat weights of weapon damage, str, det, crit, and skill speed. The higher the number, the more DPS output should be generated so long as you aren't missing by having too little ACC.
High Allegan - 511.088
Liberator - 488.682
Weathered Liberator - 465.452
Tidal Wave Harpoon - 462.279
Gae Bolg Animus - 458.064
Allegan Spear - 446.084
Wave Harpoon - 441.98
Gae Bolg Atma - 426.232
As you can see, the Animus and Atma are petty damn terrible. The Tidal wave harpoon is your best non-coil option right now.
EDIT: My estimated Gae Bolg Novus stats are lined up to be a reference value of 480.408 if it is indeed an ilvl 110.