Is everything okay? So the only way to share your work is with an Imgur link? is there no way to load the image in this post thread?
You can get the actual image link from imgur, rather than the image's page, and then it shows.
I took the liberty of doing that for you. You can click "edit" on your post to see how it was done.
https://strategywiki.org/wiki/MapleStory/Formulas#Level_Difference
You do get a 20% base exp bonus for fighting monsters within one level of your own.
However, as MapleSapo pointed out, if you can only get in half as many kills per hour (either because of requiring 2 hits to kill them, or because the map's terrain or spawn are bad), then that's not worth it.
The game provides us with the Battle Analysis system, which among its other uses can also help find the most efficient place to train. Simply run Battle Analysis for 15 minutes at each map you're considering using, and see which one gives you the most exp.
The purpose of the PIC is to protect your account in case your computer is infected with a keylogger.
A keylogger is a piece of malware that records what you type and sends it to the hacker, who then knows your password.
But since you don't type the PIC, and don't even click in the exact same spot on the screen each time (some keyloggers also log mouseclicks), a keylogger can't record your PIC and the would-be hacker can't get into your account.
Clearly, allowing the PIC to be typed, would render it useless for that purpose, and therefore useless in general.
