Game gives you multiple weapons with each one having it's own Skill Tree.
Best Weapon
- Dual Wield
- Greatsword
- Spear
Greatsword is the best weapon for most of the time because of it's useful abilities and how powerful it is.
For example in the second boss you can basically spam Potent Blow and kill him in one try.
Skill Tree
It depends on your gameplay, every tree in Greatsword is good but if you want easier fights go with the Guard and the Potent Blow.
- Guard will deal damage to your target whenever you block a attack right before it hits you.
- Potent Blow simply increases the range which you can hit with this ability.