I've just finished playing through Prophecies normal mode using only henchmen. Now I unlocked EotN for the first time (yes, I sure took my time to do so, even though I could've done it a month ago), and I am already a bit confused, mostly because of the heroes I've unlocked and I'm trying to use for the first time. I started researching them here on the Guru and on the Wiki, but through all the wealth of information I might have missed the answers to my following questions, so I apologize if they are answered somewhere. Also, English is not my native language, so reading lots of walls of text is not that easy.

1. When creating a skills order on the skill bar for the heroes, does it matter the order in which they are placed, or not? I remember reading on the Doppelganger wiki page that it prioritizes the skills from left to right, so I'm not sure if this is the case for Hero AI.
2. I didn't really bother with builds until now, and now when I'm looking over posted builds, they seem to follow a rule of how they are being written (syntax ?!). Is it because they can be copied and pasted in game, or something?
3. After hugging all the walls in Prophecies and getting my Grandmaster Cartographer title, now I see that EotN doesn't have a similar title. Is it worth it for completeness' sake to hug the walls in EoTN too, or the whole maps will be unfogged just by running relatively close to the borders? I like my maps to be 100% unfogged, so even if there is no title involved I'd like to have that. So is it worth the extra trouble?
Thank you all in advance for the answers.
PS: If anyone wants to post small personal advices regarding heroes, it will be appreciated.