We haven't formally added support for Toolset blocks as or inside re-usable blocks, and I know from internal reports that they work in some cases and not in others.
I'm afraid it is a question of trying and seeing. I can tell you that the conditional block and View block do not work as or inside re-usable blocks.
We do have an internal ticket about formally supporting re-usable blocks, but I'm afraid it is not actively being worked on right now.
I've added this forum thread to the ticket to help bump the priority.