If u really want to fly a Myrm with a stronger tank than the passive shield tank while have 100 dps more under ur ass, u can do:
Swapp the CCC I`s for a Aux. Nano Pump I and a Nanobot Accelerator I. Also throw away the Afterburner and get a Cap Recharger II in. U need to turn down one repper for a single cycle because (it won`t run perma with all V`s but close to perma) and its very interresting to mention.
Armor > Shield thx ccp
With all skills at level 5 and the appropriate tech II hardeners I'm showing the following vs Caldari Antimater Rounds.
PST Setup:
1156 Damage Tankable
Setup given above (2 Aux Nano's / 1 Nano Accel):
800 Sustained / 979 Reinforced Damage Tankable
That setup is NOT a better tank than the PST version (unless going against EMP of course).
That being said, I do feel the original setup is a very good setup, the extra speed more than makes up for the losses in dps tankable in most missions. So... +1

.
[Edit:]
It should also be noted that without the afterburner and the extra armor rigs the Blasters should be changed out for railguns in most missions, your not going to get in range of anything at a whopping 150 m/s, this takes the dps down to a max of 389 with Javelin M and 380 with Caldari Antimater, or 367 with standard antimatter. This negates the extra dps gained in the original setup, making it a tossup in DPS between this and PST setup with 5 x 650 T2 650 Arties (which puts out an average value of about 360-380 DPS with the various standard ammunition).
(all skills are at level 5 for the figures above)
All and all I would have to say that the PST is a better overall build than the setup quoted for doing missions, that being said this ship should preform very well on most level 4 missions without needed extensive cross-training for the average Gal pilot, which is a big bonus (as I'm a Matari Pilot who cross-trained to fly Gal ships, this wasn't an issue for me

).
I do, however really like the Afterburner setup you posted, and may have to start building up my blaster and armor tanking skills some more to give it a shot.