Thinking through something that has been a problem for me.
Nothing looks like a surefire gank opportunity.
You still have choices of what to do:
1) Take scuttle crab
2) Get wards down at probable locations where their jungler or laners will walk through.
3) Invade the enemy jungle
4) Force* a gank
I'm not much for #4. But.
Think about what you might lose for getting some damage or blowing a
Flash or
Ghost on an enemy laner.
*don't be stupid about it. Don't gank into a huge minion wave. don't gank if your laner is really low unless you are sure you can kill the enemy champion yourself (baiting is tricky when you aren't on comms together).
So you don't kill them, but it potentially puts your laner in an advantageous position that they or you and they may be able to take advantage a little later.
Sure you need to think about things like:
1) If I show Top can they take Dragon?
2) If I show Top can I lose one or more camps on Bot side?
3) No presence at all, unless you are know…