Reading over the exploit, I'm unclear on what actions the arcanist needs to use when maintaining control on a redirected spell. Taking control requires a standard action to make an opposed CL check, then grants a free action for exerting control.
Subsequent rounds, however, don't require any further CL checks, just another pool expenditure. Is that expenditure a standard action, as well, with another free action for any decisions? Is it a free action to maintain, with decisions returning to the normal actions in-spell (e.g., the named target spells in the entry are both spells where decisions are move actions)? Or is it some other combination of actions altogether?