This is the build I ended up with (attached)
I'm not familiar enough to know comparisons to typical optimized blaster builds, but it seems like this has a lot of damage, accuracy, to hit, defense, defense debuff (aoe for mobs and single target for AVs), and knockup CC. Great End too (maybe too much?).
I know a lot of people running devices love running trip mine, but that doesn't seem to work in concept with the positioning and rotations I'd be doing with Seismic powers and knockups. Went with turret instead because it also gives pet resist buff option via Expedient Reinforcement. Didn't find any other good resist options.
Only thing I'm not sure of: Caltrops slotting. Unsure if Air Burst will knock up people in caltrops.
Blaster - Seismic Blast - Devices.mxd