Depends on if you’re doing INT-SPR hybrid (more flexible when your summons go derp) or full SPR build (more damage on summons overall, but your non-sorc/necro skills does suffer)
For full SPR, just look at what gear the higher SPR Pardoner in town are using (except the weapon of course) and use either a staff in preparation for the eventual summon buff, or Windia Rod + OH if you want the current power.