Originally posted by Neo-Rio:

I just want to say that it's taken me 75 hours to awaken Bonemass, by myself.
Many many frustrations along the way. A lot of wasted time going to collect stuff when dead. I also had to sail halfway down the map from the center.
You know, I played through Dark Souls 1-3, but the going back to collect your stuff in this game is next-level BS.

I take it that the bosses are supposed to be done in a teams. I only managed to kill the elder with arrows when he got stuck and couldn't see me (took about 100+ arrows).
Bonemass is going to require a big hammer I take it, or I'm going to have to get him to the edge of cliff on the edge of a biome and arrow him to death too? I have maxxed out my iron armour, and have a bronze mace which does stuff all damage, plus he regens faster than I can even hurt him.

It is totally possible to beat all the bosses solo, without cheats or mods...

Also, the boss difficulty ramps up according to how many players are in the area, so if you decide to team up with someone(s), the boss will actually be a lot tougher, with more hit points, the more people involved.

It's not required, but it is certainly helpful to place portals whenever you are going to sail far away, especially to other islands, that way when you die, it's easier to get your stuff back.

Elder is not that hard to kill... just like all the "grey" mobs, they are all made of wood, including Elder, so use fire arrows on him. Use the corner pillars to block the incoming vine attacks, run to the next pillar when he summons the roots, and shoot fire arrows at every opportunity.

Bonemass, (as well as most swamp mobs), are weak vs. blunt, and again, easy if you run in and attack with blunt weapons, watch for "windup" (meaning he's about to attack), run back out of the way, then run back in and attack between his attacks... bring poison resist mead.

With every boss fight, it's best to fully clear the area of all other mobs before summoning the boss, and make whatever terrain changes you need, beforehand ( such as raising the ground all around Bonemass altar, to get rid of all the water puddles in the whole general area... prevents leeches etc.)