I usually don't. Summons can be more unpredictable than their shinobi counterparts IMO. Only if a character frequently using summonings and integrate it along with their own fighting style (Orochimaru w/ snakes and Itachi w/ crows) do I ever take summonings into account of a characters powers. Otherwise, summonings in the manga are only used given the scenario they're in. For instance, Jiraiya only summoned Gamaken after realizing he was fighting against someone who was strictly using summonings (animal path).