While you are at the forge, have Andre take four normal weapons to +10 for the Giant Blacksmith: an axe (Andre sells the Battle Axe), a spear or thrusting sword (he sells the Pike), a katana (the Iaito from Blighttown) and a halberd, scythe or whip (the Halberd from outside the Parish church or the Whip from Blighttown). From +5 on, each level takes Large Titanite Shards. Spend no slab on them, and never use a weapon on the Knight's Honor list as a base: the forging turns it into the new weapon. The bases for the next two runs come at the end of this one, at Andre.