Obviously, ultimate goal of the game is to die. Preferable, honorary, with lots of loot to rot on your corpse. There should be a prize for that noble being who died a lot. It should count permadeath only, of course.
I think you might want to lower the numbers a little bit (I'd say something more like 10/35/100 times) but I love this idea.
Honestly, preventing achievement farming seems kinda pointless. If someone wants to farm them, let them. It's no skin off my back. It's not like they get anything significant for it!
Haha, yeah, I can see it now. "Ok, I've made Herpaderp XCIX, just ONE MORE until I get my achievement! Now to strip off his gear and find a sickly diggle!" If you're doing THAT, you're doing it WRONG.
Is it wrong to dupe 500 diamonds and 20 lively regeneration potions with the lutefisk cube? I'm doing research on duping bolts of mass destruction. That's where the real dough is.