I've tried some of those mobs, not all but some and found that karul bugbears are easiest to hunt, droprates between karuls and lizard overlords are pretty much the same but lizards are too far apart to me it worth while
Yep. I hunted the Karul Bugbears from 40-44 on my BH and didn't get a single helm design. However, I did get the full Brig Helm to drop from a Leto Overlord just last week :)
may aswell hunt for the full item, im sure the chance to get it is far greater than getting 10 designs or however many you need (unless you just buy them)
you're guys luck with the design seems to stink :/ i got like 3-4 a day on a 40ish toon, managed to get enough designs to craft 2,5 helms before outlvling them, heh, then... i was a dorf, that might ahve something to do with it, lol
started when mobs were yellow and until they were lightblue hunting nothing else though