Dampeners: I've used limb savers for a long time and really like them............never tried bowjax.
Broadheads: My state requires fixed blade heads. Currently using Wasp Hammer SST, 100gr. Flies really nice out of my bow, right with my field points out to 60yd practice distance and based on my stump shooting during hunts, they are a solid durable broadhead.
As for personal input on performance on big game......I have no doubt they are a deadly broadhead, but while I came very close to getting shots this year on a couple bucks, just couldn't get it to come together in the last few seconds and ended this frustrating season with rare unfilled tags.
Muzzy's are good heads.
Friend of mine, gets a lot of broadheads to try-out/review and currently trying/likes Slick Trick. He also likes Muzzy, Wasp and in G5 line, has used the Striker on a few animals
2009 Martin Bengal M2 Pro Cam w/factory STS & CCS.....66lbs, 29" DL, 422gr @ 272fps, Winners Choice string/cable, Trophy Taker drop-away Rest, Scott Release
1996 Martin Firecat XRG Pro Series w/Ultra Sonic wheels.....69lbs, 29" DL, 465gr @ 245fps, w/fingers & Martin leather glove