This is probably the most respectable Tier List Thread I've seen so far, so I'm going to go ahead and post my tier list here:
*MY TIER LIST*
I''m updating it now so bear with me.
Ours are roughly similar, although I personally feel that the Forge Pro and Dual Squelch belong in A and not S, and I believe the Dynamo is good despite the best teams not maining it at the moment. I also gave everything a Slaying tier and a Support tier, independent of actual tier placement, to give a better illustration of why weapons are where they are. I also consider S and A virtually the same tier as far as effectiveness, with the things in S being what influences weapon choices moreso than A and below.
There are also a few weapons I don't consider S tier, despite good players using them. Paradise uses Jet Squelcher and wins, but that's a case of the player being good and not the weapon IMO. We'll see over time though.
Also
@CutestFish - is anyone using the Splattershot at a high level besides me? I've only noticed one other Splattershot in a top 8 and it wasn't running a damage/bomb range build like I do, and I think that's the optimal loadout for the Splattershot. I perfectly agree with its tier placement in A, I'm just wondering why you think it belongs in A, because I don't think anyone else plays the weapon like I do at the moment.