I'm having a pretty rough time. Got through most of the worlds without too much trouble even though I'm rusty at Souls. All I've got left now is 4-2 (and 1-4). I went with the Blueblood Sword build and I'm nowhere near it meeting its potential yet, still need a ton of Luck and Magic.
The issue is that I can't for the life of me get through 4-2. Something always goes wrong. It's so much tougher than the others it's insane. The world tendency there is dark now, which means OP red phantoms everywhere, and I always get felled by one of them. My go-to spot for leveling was the beginning of 4-1, but I can't level there anymore because there's a red phantom at the entrance that can one-shot me and seems like too much trouble to fight every time I want to kill a round of skeletons. So I'm basically stuck in a rut where I can't power up anymore, my build is half-finished, and the last zone I need is completely whooping me. If I could get through to 4-3 I could level on manta rays and get the build closer to done. Hell, just getting to NG+ would be fine. No clue how to reset world tendencies.
By the time anyone reads this I'll probably have gotten past 4-2, but I've been at it for literally 6 hours without ever getting to the end. Did reach the boss a couple times and died in dumb ways. I finally broke down and summoned other people to help, though more often than not it's an invasion instead, or the summoned people proceed to also die on red phantoms. First guy I summoned was a pro and pretty much owned everything in the level, then I got aggro on the boss and died like a moron. That first summon was by far the closest I've gotten to a win. Tough to learn the boss when I can't retry the fight. The lack of checkpoints in this one is brutal.
That's Souls baby
Edit: Almost 8 hours in now, no progress on 4-2. Another issue is that I'm basically doing an inadvertent Low Level Game since I can't really power up and with the BBS build survivability got neglected a bit. Everything kills me in two hits. Though I did find that I can farm summoned ghosts down towards the Old King lair for 1500 souls a pop if I really need to.
Edit 2: Finally beat the level at around the 9 hour mark. Old Hero was an incredibly intense fight once I finally got back to it. Protip if you don't know, he can't see anything and goes off of hearing, so the Thief Ring made the fight way easier. That ring also nullifies most of the flying manta rays in the level that were murdering me for hours. They're too far out to see you with the Thief Ring on. Once I realized that, I finally got through it. Time for New Game +