My friend told me you needed a saradomin item or you'll die almost instantly. And you should also have a zammy, and armadyl item.
I've never been there, so I have no idea. This was a friend I have on Runescape who goes there all the time. He said it makes you stay alive a lot longer.
Wait, so I'm going to jump to the aviansies room with the grapple. I got a arma pendant. But in the arma room, are there zammy or sara aviansies? or are there both?
Aviansies are armadyl. In GWD there's just other npcs who are zamorak or sara.
In the Armadyl room I think there's just zamorak. But I'm not sure. I bot outside armadyl eerie because I feel its better. I'd bring all three. Since you're a zerker just bring zamorak shield and sara skirt.