Guild Wars 2

Hi everyone!
I’ve got a few noobish questions (yes, I tried to get an answer using the search function and/or the wiki and sorry, english is not my native language):

1.) Regarding Sigils: is a sigil like Sigil of Accuracy effective, even if it is on my alternative weapon set?
2.) In WvW: When it is Zerg versus Zerg I often do not see any enemies (so far nothing new). People are telling me that I can tag them by using “tab” to target them, however, “tabbing” doesnt do anything. Reducing graphic details does not seem to help. Do I have to accept this “as is” or is there any workaround?
3.) Necromancer’s Epidemic Skill: AoE Skills are limited to 5 targets. Does this hold true for Epidemic as well (I really tried to figure this put by myself, but all those numbers popping up and being killed to fast kinda spoiled my efforts…)?
Thanks a lot for helping me out

1) Sigils are only effective if they are on your main weapon set. However, effects created by sigils such as precision and corruption, that grant stat bonuses, are effective until your character becomes defeated, re-zones, or unequips the weapon.
2) Tabbing is a horrible way to target, even on the fastest computer. I personally know no easy solution to your problem.
3) Probably.

Isn’t tabbing the “target nearest enemy” key? I have that mapped to a mouse button. It’s not a horrible way to target. If you need to select someone specific then just click on them otherwise I just target nearest enemy. It’s fast and it works. However, I’m not sure about your WvW situation, I’m just speaking in general.

Sigil stacks drop when you’re downed, not defeated.

The wvw invisibility thing is a problem with the game that they are working on improving. Don’t think there’s anything you can do.