Every piece has a use, so aim to get it all. Personally I'd put Pummeler's Mufflers +1 last on the list.
First I'd probably go for the berserk duration+ gear (Pummeler's Lorica +1 and Agoge Calligae +1) and Pummeler's Calligae +1 which are pretty much essential war pieces currently.
Both the leg pieces are awesome for TP sets, with Agogo being for low acc set and pummeler's for higher acc set. Agogo is a decent ws piece too until you can get Scuffler's Cosciales.
Try to get the Relic head to 109 ASAP, +1 it eventually but 5/5 Savagery WC that lasts for 55s is beastly. +700 TP is very noticeable for unleashing a ton of high powered WS's in a short period of time, and best of all it effects your entire party so everyone can join in on the fun.