Thw WC4 Stormfire was great! The Stormfire in WCP, while considerably weaker was still good.
I usually use full guns in all WC games, except SOPS. There I used, except in the Vampire, almost never FG. Panther: Cloudburst, only at very close range FG. Shrike: Pulse Particles (the gun pool is just to small and recharges to slowly for the dust, plus they are mounted on the oustside) Devastator: Plasma (I think trading the Stormfire for the tachyon was no good deal). Wasp: Dust (I almost never had serious problems with energy shortage)
BTW, it is not the Chain Ion/Cloudburst combo that does not work (look at the Vampire: You have fast firing Pulse Particles and the tachyon), it is just that the chain ion is total carp, due to their incredibly short range and incredibly slow travelling speed.