I run a sort of bulky offense team that uses Volt turning to edge out momentum using Parsee Assist, Kyouko Power and Iku Power though they don't exactly create a true voltturn core themselves
Though that being said Iku Power is a great addition to the slow VoltTurn strategies or just as a general Pivot as she can act as a sort of catchall answer to things you don't have a plan to deal with and also gives a ton of utility to your more fragile sweepers as she can give them a free switch in by being slower and taking the hit before switching out.