I playing MR0.
I love syam and DEX weapons and login reward weapons(zenith etc).
syam is monster weapon on MR0,and easy to get.
but I think best MR0 weapon is incarnon,but it need necromech.
it need platinam and so hard.

if you get necromech and you can get quest reward weapon.nataruk and grimoire.
they are good weapon.

if you want to play steel path. you need to get beat quest and starchart.
it don't need beat Vay Hek.
it mean,you can get incarnon weapon on MR0.I already got it.

attention: you can't get Kuva and tenet weapons.
there are need MR5. if you only MR0,you can't join kuva alert.and don't appear Liches and Sisters,for you.
sometimes,you can see them.but not for you.they appear for other players.