The most efficient way to spiritbond now is to either craft ilvl 45-49 gear and go to Urths Font with an AoE job at 60. If the gear is HQ and 1 materia (2 materia for ilvl49), it will take roughly 30 mins to spiritbond a set of gear. If you want to stay in Heavensward, you can buy a set for Moghome and gather something worth your time to gather and sell or craft into something else to sell. Either way you want lose gil it will just depend on how much time you want to invest. You basically have to have a battleclass at 60 or a gathering class at 56 (fishing is too slow imo but you can still catch certian fish to sell).