The best exp for ur gil is doing the single item leve turn ins that require u to travel to another place to hand in HQ item.
I.e u get quest in u'ldah but r required to hand in in quarrymill.

Triple turn ins got nerfed and r now a huge waste of time and some gil.
ur better off just doing the single item turn ins trust me.

Probably best rotation for weaver ( no other classes involved ) is
To just have all HQ mats and do
Steady hand , basic synth, great strides, basic synth ( use standard touch if great or excellent ), basic synth, and another standard synth i u can afford it or just finish it up and hope for HQ.