Yeah, I mean even with effects that don't appear to have any immediate synergy, all you do is spend SP and produce the effects as part of a single action.
So, for example, you could spend 2SP in a single action, 1 on Sheltered Vitality to heal/protect an ally, 1 on Hypnotism to simultaneously fascinate a cone of your enemies. Instead you could have spent 2SP on Sheltered Vitality for more healing or 2SP on Hypnotism for double the HD fascinated.