that player stress hurts so much, damn it

If they do this then they should let us shoot the cannons from our boats......

I would argue at least 56 or 57.  Up to 59 wouldn't allow for the "hardest spots" to be grinded because so many skills get their final damage levels at 60, the last AP point is at 60, and a few skills show up at 60.

The reason 56 or 57 is almost mandatory is because that is when you unlock awakening and when you get the majority of your mobility.  

As for the 12 hours a day in Marni hiding.  Not really, because it is 1 hour in, 1 hour our and so on, if the hours stacked allowing you to stock pile up to 3 or 4 hours sure, but when you have to be out for an hour before you go back in, you realistically do not get 12 hours, at most you get 4 if you play for 7 hours straight and had the hour already saved up.

Alternative solution that is pretty much the same as Centaur4life's suggestion:

Give players consecutive hours in Marni Realm. Right now, you are allowed 12 hours in Marni Realm, but you can, for all intents and purposes, only grind peacefully 1 hour at a time before being removed and required to wait another 1 hour. Even if the overall total of hours are lowered from 12 hours to 3 or 4 per day, this may be more in line with players with a more restrictive play time.

If this is being suggested to fix some overlooked issue like with sailing and bartering, lifeskills shared via the family should fix that.

People will probably not like the suggestion, but I also do not think one player hunting down another player that clearly does not want to fight, and does not fight back, is not PvP. It's a one-sided slaughter; pathetic pickings by someone looking for an easy target. As it is, you'd still want to get to at least lv.62 if you're serious about progression and efficiency.

A 270ap level50 can oneshot 150dp level60. Level has nothing to do with this.

The only reason you want this is to grind over other people in safety.

If you want a safe space in your game, go play Minecraft please. This game was notorious for it's epic combat system, but even more so, the PvP. Anyone who says otherwise is a dent and doesn't know what they are talking about. It's people like YOU, who want a safe space to play a game, that has ruined it. The game is dying, no one can argue that, why? Because of safe space grinding, because oh nooooooo someone on the internet was mean to me, wahhhhhhhhhhhhhhhhhhhhh. 

Tell you what, we can raise the PvP Immunity from Level 49 to level 60, but there will be negatives to it. No more tagging, no use of blackstars or dead god armors, your limited to Tuvala gear, no use of mastery life skill gear, nothing higher than an Epheria Frigate or Sailboat can be driven, no T9 or T10 horses, and your life skills are capped at Beginner 10.

You want to reap all the rewards and risk nothing for it. That's not how this game works and when it does work that way, it'll be so dead, it won't even be worth burying.

You can ask my guild, I was a hard core lifeskiller, hated PvP, and wanted nothing to do with grinding. I was enjoying my game play until someone I used to be in a guild with, decided to hunt me down one day and kill me. A fire was lit under my ass and now I'm approaching 730gs and reguarly PvP, and can easily kick that guys ass now. Don't get me wrong, I still find Node War / Siege to be cancerous/toxic as hell because of guilds like Digital and ChoNation. These guilds push themselves to be the best of the best, and they deserve to be able to show that skill and pride off. Who are you to tell them how they should play the game? Don't like it? Swap servers, you've got 20+ servers, while there are only 2 PvP servers.