If your conversation's <START> node links to a lot of nodes with conditions, you may find it helpful to use group nodes. To turn a node into a group node, tick its Group checkbox.
When the conversation below starts, it evaluates 4 compound conditions:
To reduce the amount of conditions that need to be evaluated, you can use groups like this:
If A is true and D is false, then the right tree (E & F) won't need to be evaluated.