B2 mb up bat if it's near the beginning, b2 sky grapple if it's at the end. You could also use it to get more damage off of standing resets by ending them with ISB b2 grapple. For example 123 j2 123 b1xxISB b2xxgrapple NJ2. Thats how i use it.
To start them, I use things like f2 and b1.
If you just throw them out and put rb after it only comes out on contact. Use a bat to make it safe and now you have more footsie tools.