I mean amarr has some pretty nice options too I’d think. A harbinger should cut through lv3s no problem, I guess the question there is will it have enough cap? I don’t have a fitting tool right now so I can’t really answer that easily.
beams with mwd, tracking comp, sensor booster, large cap battery, then heat sinks and tank in low slots with hyperspatial rigs would be my first try, not sure how much extra cap or fitting mods it would need. And remember for blitzing most of the time you only need a few mins of cap anyways
also there’s the question of rerolling, you need many of the same skills to do well on a caldari ship so might be worth looking at what skills you want and if they will fit in the cap. Plus if you get into blitzing you should be able to afford some alpha injectors.
lv2s just about any decently fit cruiser should cut through no problem. Omen and arbitrator both worked pretty well when I used them and that was even before ship tiericide so they should be even better now.