Should I equip this Fafnir?

 Spoiler

I know there's still cubing to do -whenever I get around to it-.

I'm just wondering if the +2.5k clean range (+3.1k with Medi + MW) and PDR increase would outweigh the -15% Boss.
Stat window shows 172%Boss and 75% PDR with the SW.

If it helps, PDR sources are:
30% Leafre Codex
20% Arcane Aim
15% Lumi link
10% Zero link
10% SW Staff
10% cRA Hat
5% cRA Bottom
5% cRA Pants
5% Battlefield Conqueror Title
(But this "adds" up to 63% unless I'm doing something wrong or missing something. It shows up as 75% in red in my stat window though, like it was being buffed by something.)