I've made another change to the dabbler, allowing them to use their invocations to power Reserve Feats and magic items (such as runestaffs). In general this shouldn't increase the class' power necessarily, since the dabbler still needs to be able to prepare an invocation of the minimum effective level to active the effects, but it should give the class a little extra versatility in combat, especially at low levels, and at higher levels it should help reduce the class' complete reliance on wands, staffs, and their conjured allies.