So, the problem I have with the Intel Agent is that it's not something you are using every round. Because it's Range 1-2, you aren't going to get to use it until ~Round 3, at which point you are already in a rhythm. You're eager to get movement going. It's just... rare that I remember it those times when I have a chance at using it.
I really need to figure out something to act as a reminder. Maybe keep a copy of Intel Agent with my dials so I remember.
As for seismics, they are great little toys. I usually keep them (unless the craft is heavily damaged) until later in the game just to increase the chance my opponent forgets about them.