Which map is it easiest to get the guardian title on?

I was wondering out of all 3 games which one is the easiest to get the guardian title on?

I imagine Cantha, Seeing as it only has about 13 missions..

I agree, Cantha would be the first one to go for if you have all three chapters and have already achieved protector on all of them.

i had the easiest time with elona, personally.
while cantha only has 13 missions, eternal grove is proving to be my nemesis >.<

You're not alone there. Eternal Grove is generally agreed on to be ludicrously hard in Hard Mode.

Personally, I didn't find anything in Tyria overly difficult (but that may also be because I have done those missions so often that I can do them with eyes closed and one hand tied behind my back by now). I think the hardest there was Nolani Academy due to that stupid rushing and overaggroing Rurik.

Haven't done much Elona yet.