The fit is decent. What Anderson wrote is 100% it. Seeing the 2 vexors and this Myrmidon, you clearly know what you do.
I’m on mobile without EVE and Pyfa, so this will be more about feelings than about specific numbers. And I will be a little controversial as usual on the forums.
I would even suggest to you shield fit Myrmidon for L3, but more on that later. Myrmidon is a little overkill for L3 and on the other hand will struggle a in L4.
I would ditch damage control, which gives you good buffer for pvp, but gives you not so good resistances for pve. That is part of the eternal discussion if DC is good for pve. I can’t say that it’s not worth at all. Not in this case though.
You want as high resistances for mission specific damage and then rep it all against incoming damage. Don’t be keen on cap stable. Don’t really need that. Important is time.
Change damage control for mission specific active hardener and keep the adaptive hardener, whatever. They don’t stack against each other. Resistances of DC and adaptive hardener stack only against each other but not to other hardeners (unless CCP changed this recently). Little bonus.
Whatever, you might also take 2 specific hardeners for specific mission.
I would ditch the recharger in mids, feels suboptimal, mitigate that by piloting and dedicate the mid slot to drone speed or tracking enhancer.
If you go for dual rep, then I would suggest links in high slots, which will give a good boost to dual reps together with the rigs which you have. Apply rep links. They will be similar to resist links, but resist links will stack their bonus against your hardeners, but rep links will not, so you get better result with rep links.
But you don’t need dual rep for L3 anyway and you will struggle in L4 in Myrmidon. You will do it, but it will be slow.
For L3 I would go with all DPS fit and mitigate damage by range primarilly. I did L3 in low sec mainly and have limited knowledge of them, but you can do them easily in a cruiser.
MWD and Republic fleet cap battery which has same power grid fitting requirements as the compact battery, but will give you more bang. Remaining 3 slots dedicated to drones. Speed and tracking.
I would even consider shield fit, but since you have 3 drone damage amplifiers already, then you are good to go anyway and you still can enhance drones in mid slots.
Dominix would be much better for L4 yet Dominix is a “pain” for L4 in terms of speed of completion. But Myrmidon is even worse.
For L4 you need basically 4 things:
Interceptor for blitzing the ”Recon” mission (the mission is 3 parts, but do only 1st part). Mission always spawns in the system where your agent is. It is 2 mins in interceptor for 2000+LP, 5+mils ISK easily.
Machariel for blitzing specific missions for agent standings only. Like Dread pirate scarlet or Pirate invasion (not really necessary to do any other mission if you have faction standings). Dread pirate scarlet is legendary, but the invasion can be blitzed also very very fast with MJD to the carrier wreck, kill the 6 battleships only and warp off. You need DPS for that. Don’t go under 700+ Cherry on top of the cake is that the mission always spaws in the same system as your agent is located. Blitz for standings only, because you want burners.
Frigates for burners. Burners were nerfed in past, yet they are still very rewarding in terms of LP which can be burned into something usefull. I will not write here what exactly for obvious reasons. You will figure it out. There are more options. You can still hit 200 mils per hour in high sec with very little risk… if you enjoy it, but you can do them casually for a little less, for they are cool. Angel dramiel is soo cool… not the most rewarding but simply fun (yet way way higher than regular annihilate everything L4’s)
Faction standings. Takes time. But then you can literally cherry pick missions. Worth it 10/10 and most important one.
This was not critique. You are doing very good.
Cheers and hit me in game for whatever comes on your mind.