Originally Posted by Cuthred
in my case, I only got the first 2 elite items (helmt + boots?) from the spider and loads of elite runes. I then switched to farming Grendel (with tokens!!) and got all the remaining set pieces. Still took some hours though.
Personally, I think Grendel farming is better, as it also will help you towards other achievements ... make sure to get the tokens though first and quit the game if nothing drops to prevent the tokens from getting reset.
There is always the debate about whether GRNDL farming is better but in my case the last achievement i needed was for an elite armour set, so i stuck with spider farming because it didn't need too much brain activity
. There was actually a time where i fell asleep, haha.