Almost all eth treks and eth andys suck. I would much rather have 15/15/70 non eth treks than literally anything other than perfect eth ones. The stats and resists are more important to me than extra defense. Similarly I would NEVER take a 10% ll non eth andys off my merc for anything other than 10% ll eth one. Considering how much cheaper perfect non eth versions of these items are compared to junk eth ones it just doesn't add up to me.