Board Thread:Wiki Discussions/@comment-173.25.131.0-20140113153558/@comment-23870891-20140131004710

Order matters a lot Wild, and even armors as good as those can be beaten with the proper order (notice you are missing forgestone, while it does have lower stats then many of those, its element adjacent nature makes it superior to both beast and arborsteel (and maybe even sky majesty)).

Laser, fusion stones are great for leveling epic boss+ armors, but saving boosts for epics above level 70 (or even level 80) is usually the best way to go. Once you have a good assortment of legendary+ armors, then start saving even the stones for your epics. Assuming that none of your epics are moontide (This epic is worse then modern epic boss+ armors, and 2x as expensive to level, avoid it unless you just want it for cosmetic reasons), you should arguably focus on these rather then epic boss armors. An exception would be if a another boss event occurs, but leveling those epics is essential for being competitive in GW and arena. Once they are maxed, focus again on the epic boss armors until you get another epic.

To simply answer your question: fusion stones ok on epic boss armors, but save boosts from now on for epics.