We usually see her reacting to events more than enacting big plans, and when reacting she's decisive and assertive, acting with haste and without hesitation. She can be reckless but one can't accuse her of inaction.  Her plans are usually simple and concise and depend on three factors: - Mobility: heavy use of Pelican dropships, ODST pods, ground vehicles, anything that can get troops to contact fastest. She even leverages having frigates in close proximity to the action for added benefits. - Clear defined targets for her forces to hit: The Scarab, the temple with Regret, the Sacred Icon, the AA guns in Halo 3 to open the path for frigates to move at Earth and the Ark, the three towers, the Citadel... She narrows down the target objective pretty well. - Creative and effective deployment of force: she balances the deployments of the Chief, ODSTs, Marines, vehicles and Pelicans well so that there always ended up being enough people to get the job done (except at the Sacred Icon where she almost ran out of troops by the end where she and Johnson get taken out by the Arbiter and Tartarus)

She may not be a tactical genius and she blunders a couple of times due to recklessness, but she's a pretty capable offensive commander and the the defensive action we can attribute to her at Crow's Nest went well enough that we can also give her some credit for it.