The blue aura surrounding Magnus is a safe zone. Outside of the safe zone, your HP slowly decreases, your damage is decreased, and your healing abilities are reduced. You are not protected from meteors or Magnus' attacks within the blue zone. The safe zone shrinks over the course of the battle, with the message at the top of the screen reading "Magnus can no longer suppress Guwaru. Guwaru's power grows..."
You can hit Magnus when he is casting his aerial attacks, although the hitbox is moved and he has a few invincibility frames during the animations, so not all attacks can land.
Because the suggestion was spammed to the point of obnoxiousness, the number of people who want it isn't really as large as people think it is, no one in the community can seem to agree on what version the server ought be or how updated content (I.E. Arcane River, 5th job, etc) should be handled, and several replies from Nexon employees speaking officially and unofficially indicate that the answer is more or less a no for a variety of reasons.
Mostly that first one, with regard to the topic being banned from the forums. The topic is not banned from the subreddit (to my knowledgde), or any other social media outlet other than the forums/Discord.
To my knowledge, the EXP potions (the Typhoon potion at least, if not the ones in the shop) give you enough EXP to go from 0% to 100% at your current level, regardless of what percentage you're currently at. So if you use the potion at level 220, you will gain 84,612,097,752 EXP, regardless of how much EXP you already have.
Because it was created in a time when 32-bit games were common, and it's not really possible to simply "upgrade" from 32-bit to 64-bit without rewriting the entire game from scratch.
In any case, a 32-bit application is not in any way particularly "worse" than a 64-bit application; Microsoft Word, for example, is 32-bit. Additionally, most 64-bit applications are not truly "64-bit" because they don't need to be. Additionally, some programs can be hybrids, and judging by some of Maple's numbers this is likely the case, with 32-bit mainly being lower-level architecture.
