I'm trying to make sure I have this right because I don't want to try something only to be laughed out of the room or lose credibility for attempting to break any rules.
I have an L2 Magus who (obviously) has Spell Combat and Spellstrike. Let's say I use Spell Combat, casting Shocking Grasp and missing with both my attacks (the free touch/weapon attack from the cast/Spellstrike as well as the regular attack) and continue to hold my Shocking Grasp.
Next round, I'm up and I'd like to do the same thing as before, only changed slightly. I want to use Spell Combat, attacking first and casting later. So, let's say I hit with my normal attack and deliver my Shocking Grasp through my weapon, discharging my held spell via Spellstrike. I've spent that, but Spell Combat shows I can now cast a touch spell (to be easy, let's do Shocking Grasp again), which can in turn be delivered with another attack via Spellstrike. We're looking at 1d8(longsword)+2(str) + 2d6(shocking grasp) + 1d8(longsword)+2(str) + 2d6(shocking grasp); an average of 27, which will easily one-shot a lot of CR2 and lower monsters (let alone myself).
Is this previous paragraph an accurate description of what I can do? I know at least one person at my table that would scream about how ridiculous those two rounds would be.