Two non-weapon slots only really hurt for any gunship with less than .25c and 50 or less cargo capacity. Not just Freyr, but also Raijin and Spartan. At least in Eternity Port, neither Wolfen playership nor Elysium gate cheese are available. If Wolfen was available in Eternity Port, it would be my no-brainer gunship pick. Corporate Command playerships have to compete with the original three, and Wolfen beats Freyr in the things that matter (small profile, speed). Wolfen is fast enough to not need an engine upgrade (though being unable to get enhanced Titan or Megadrive without giving up either cargo hold or jumpdrive hurts a bit). Other gunships want cargo hold expansion, a jumpdrive, and an engine upgrade, but can only have two. It hurts so much I just opt for Wolfen (or Sapphire) instead. At least jumpdrive is practically useless in Eternity Port, meaning I just get cargo hold and a big engine for Raijin and Spartan.
I generally do not bother Raisermesser weapons. For launchers, nothing beats NAMI for early and mid-game due to how ubitiquous and cheap the launcher and missiles are, not to mention tracking. Plenty of enemies use NAMI. Most users of MAGs are generally friendly, not something I can loot from enemies with any regularity. As for energy weapons, I generally loot one from enemies, which usually means EI lasers. Flensers are good, but (at least before level-aware shops) they were hard to find when I wanted one and did not have better. Akans are good, but I dislike ammo weapons (mostly because ammo gets in the way of cargo space and inventory management). Thorins are okay, but I usually have better by then. I do not bother trying to get the Ion9. (Usually because I get jumpdrive somewhat early, dive to endgame subsystems, and spawn a high level weapon at a Teraton fabricator.)