This disclosure is directed to systems and methods for determining target allocation parameters for initiating targeted communications in complex computing networks, which may be associated with the allocation of allocatables in execution events over a first period of time. The systems and methods may include receiving a desired allocation; determining a first instantaneous available allocation at a first time; generating an allocation graph for a second period comprising the first time; determining a second instantaneous available allocation at a second time; determining a remaining available allocation at the second time, based on the allocation graph and the second instantaneous available allocation; and determining one or more target allocation parameters for initiating a targeted communication to a computing device during at least a portion of a third period of time between the second time and the third time.