The balance in this game is pretty good so there are actually a wide variety of weapons that can be effective for a fixer. There is no perfect build. All of these weapons will seem lackluster if not leveled enough for your current infamy and fantastic if it's over-leveled. It's just the way the game works.
My comprehensive thoughts if it helps:
Cannon/Blast cannon/Sniper Rifle - I've personally used cannon and sniper. I slightly prefer sniper but it depends on the battle which I'd rather have. I've seen a lot of fixers using blast cannon well but mine is not high enough level to use yet. These are probably the most widely used fixer weapons with good range and cooldown. You can't go wrong here and
I would recommend leveling one of these for sure and then experiment with other kinds.
Flare Gun - Good choice. Debuffs enemies for teammates and does more damage than cannons over time.
Napalm - No doubt about it, this can win your team games if you can count on competent teammates. But you can't and it leaves you defenseless. i wouldn't recommend until you are in Chaos or above probably. Preferably one of your teammates should have it.
Grenade/Explosive cannon - aoe with no minimum range. I've seen high level fixers in Porthos vids using these.and probably great in those group cluster f%%% fights a fixer is in frequently.
Carronade - I didn't like it because it didn't do enough damage to give up the range, but I think carronade drastically increases effectiveness with high level talents.
Rail Gun - I didn't like it with fixer because it's really finicky to use. The slightest wave or movement renders it useless and anything close nerfs the damage with a huge cooldown so it is hard to setup as fixer who is concentrating on teammates for healing. That said I was using a lvl 10 rare and if I had lvl 30 epic vaporizing enemies I might feel differently
Mine - I've seen quite a few fixers use this. This can be very situational so I don't like it as the only weapon you have. Some battles it will do nothing but if you have a high level mine it can work very well. Do not try with green mines.
Torpedos - These are a little harder to aim so it can be distracting when trying to switch to box launcher and keep track of allies to heal. I've seen plenty of fixers racking up the damage with a big torp and I am leveling mine to try it. Tritorps can be great area denial and do good damage. Swift torp is not worth it when you can use big torp with 2 slot points.
Mortars - These are a little harder to aim so it can be distracting when trying to switch to box launcher and keep track of allies to heal. I wouldn't recommend them because they leave you defenseless up close and only really do big damage to groups.
Missles - I don't have enough experience using them. I've seen the rare fixer using them and I think they could be effective if heavily talented as they will do good damage with a low cooldown. High level shooters using them certainly hurt.
Click to expand...