Hope someone can help me answer some of them, or just start some discussion around them. Random things that come to my mind right now:
- When do I upgrade weapons? I have the Crescent Falchion +1 from 4-1 and it's pretty good since my magic attributes are the ones I've put most points into. But I just don't know at what point I should start looking to get another weapon and upgrade it. I can't upgrade the Falchion since I miss some shard or stone I need. But I have loads of unused stuff that this guy Thomas? is keeping for me. Should I bother upgrading any of it? Will I find better weapons just lying on the floor at some point further ahead? Are all the weapons potentially equally good?
Most "basic" +0 weapons can be decent enough if upgraded, though there are a few genuinely bad ones (like the claws, daggers, pickaxes etc.). However, not every weapon can be upgraded along the Crescent path (which scale with your magic stat and regens MP, which is best for your build). But most can be upgraded along the Moon path, which
also scale with magic and are a bit stronger but don't regen MP. A good rule of thumb to remember is that "dex" style weapons can be made Crescent (this means uchigatanas, falchions, kilijs, rapiers, estocs, flamberge etc.), with the exception of the spears (not sure why), but not "strength" style (longswords, axes, claymores, maces, etc.). However, almost every weapon AFAIK can be ascended to the Moon path, which is also very good, and a good alternative if you have a lot of moonlightstone but not many darkmoonstone.
The crescent falchion is good enough to carry you through the game, especially if you upgrade it, but if you don't like its moveset/range/power/whatever, I'd suggest the katana (upgrade it to +6, then to Crescent) or the war scythe or mirdan hammer (upgrade it to +6, and then to Moon) or maybe even the claymore if you don't mind upping your strength more (ditto on Moon path). The poles are better used two-handed, but they have exceptional range, speed and power (some call them the "noobsticks" haha, especially in PvP). The claymore is also ridiculously good, especially against multiple mobs when 2-handed, but it requires a bit more STR.
FWIW, the stones to upgrade the Crescent path are found in Shrine of Storms, you should have found some already (try to hunt the crystal lizards there). For the Moon path, they're all in Tower of Latria.
Oh, and yes, Boldwin won't upgrade along these paths (he only does basic+10 and Quality+5). You need to talk to Blacksmith Ed in 2-1 for that.
- About armor, I guess light armor is better than heavy one? I bought some chain mail from some merchant in 1-2, and had to take it off immediately as it was slowing me down too much and couldn't run enough to escape from the dragon's breath afterwards.
Absolutely. Always stay mobile. The meagre extra defense points you get from heavy armor are never, ever worth it... unless you want to gimp yourself. Which I've done, for the lols, but that's after beating the game so many times. ^^ Fatrolling is pretty much Hardcore mode, and Fastrolling is Easy mode.
- I've been using the Soul Arrow most of the time. Lately I got the Soul Ray, which is good but uses a bit too much MP to be a total replacement for Soul Arrow. What other spells should I bother to learn? Again, are they all equally good in the long run? Besides the Fragrance Ring, are there other good ways to recover MP?
The ring stacks with Crescent weapons, and the ring with a Crescent+5 is the fastest way to regen MP, but it's still very slow. Just stock up on tons of spice, it's cheap. Blacksmith Boldwin sells 'em for about 200 or 300 souls a pop. For old spice, the singing lady in Latria sells them the cheapest, at 1000 souls a pop, which may seem like a lot but at some point it'll be a joke.
- How do people beat bosses without using the Soul Arrow? I've relied almost exclusively on it for most of the bosses. The Adjudicator, for example? Or the Leechmonger from 5-1? I guess there's bows and so, but are they a good option? I don't have enough points in Strength to use them.
Bows are good, yes, but you don't need them if you have ranged magic (or you can have like a basic one and use it without the requirements, not to kill enemies but just to lure them to more suitable terrain if you're out of lock-on range). All bosses can be beaten with pure melee, with some proper dodging, blocking and timing. Normally you would chip away at a boss's health, but not spam so not to empty your stamina but instead roll away or block, regen stamina and repeat. The most important thing to remember when fighting a boss with melee is:
don't get greedy. In my noob days I died so many times because I figured I could spam just a few more hits, but instead the boss survived and I drained my stamina and was wide open.

Patience is the key.
- I've read I should not distribute xp points in all attributes equally. I've mostly done Vitality, Intelligence and Magic. Will I screw up if I put points also in Strength? I want to use better shields, swords and bows, but I'm lacking points there.
You've done very good so far. No, you won't ruin your build if you invest in some STR to use different weapons, so long as you don't up it
too much. For a magic build, I would recommend not going above 20 str at the very most (if you want to use, say, the claymore 1-handed). I made a similar build to yours on my third character, a melee/mage hybrid (no bows) with a decent shield, and I upped strength to 18 to wield the uchi (this opens up many good shields too, such as the kite or knight shield, the steel shield and eventually the almighty Dark Silver Shield).
Fuck 2-2. I've died countless times jumping from the platforms in the right hand path. And I also died in the lava from the left hand path. I guess I'll have to take the left path and be more careful, but so far this is the level I hated the most. :/
This is actually not so bad with a magic build. The giant bugbears are vulnerable to magic damage. Without magic weapons they take
forever to kill, haha. I was going nuts down there on my first playthrough (which used a dex build).
@FerranMG
Upgrading - The basic hard/sharpstone upgrading is done in the Nexus but you will need the Flamelurker soul to tap into the other upgrade routes using the blacksmith in 2-1.
Not quite. He needs the Flamelurker soul to upgrade
unique weapons (those requiring Colorless Demon Souls), and to make weapons out of boss souls. He doesn't need that soul to make moon/crescent/blessed/etc. upgrades.
Unless you are building a tank build then agility > being able to take a hit.
I object to the "unless" because this suggests there's such a thing as a "tank build" in Demon's Souls. There's not. In Dark Souls, yes, but not Demon's. Agility > heavy armour,
every single time. Honestly, this is what should be told to everyone requiring advice for the game. The first advice to give is:
don't fat roll!
