Acontinuing challenge in today's decentralized operations is maintaining situational awareness of other joint task force elements operating in the battlespace. what are some joint task force level commanders doing to effectively deal with this challenge?

I Believe the answer is: providing battlespace owners (BSO) with "coordinating authority" to ensure good coordination with other JTF entities

Coordinating authority would generally set up a proper chain of command that must be followed by all groups that involved in joint operation.
With this, they would still be able to achive mutual goals even of they are operating on different core leaderships.