This is a reference sheet for pve raiders with a stable of alts that are wondering whether it's worth going for any of the specialization ascended weapons that you unlock via achievements rather than crafting. Feel free to ignore if you: a) have a use for these, b) really like the skin/name, or c) only have 1-2 planned raiding alts [in which case, crafting specialized pve weapons is fine for you].
Since I main a guardian/dragonhunter and plan on getting my ele, mesmer, necro, ranger, and engineer into raiding shape, I have a need for a lot of ascended weapons and armor sets. Thus, going for specialization weapons lessens and diversifies the grind.
However, the nine ascended weapons in the specialization collection are not all created equal. For one thing, although you can pick their stats, you do so from a list of three choices, and those choices differ per weapon. That means that some weapons are not worth going for. Also, some weapons just aren't as useful to have as others, so unless you are dedicated to a class, it's just not worth it.
The chart below shows the name, class that you'll have to have at 80 and do HoT events, etc on for achievements, and my notes.