No Timesplitters 3?

Well, I like playing this game with Deadwina. She’s the fastest, but she gets killed pretty easily. Oh well, besides that, I do very well I must say, but I seem to have run into an annoyance. Whether I’m using her or even the Stone golem, it seems that the shotgun and tactical-12 are freakishly dangerous mid, close, or far-range. Being Deadwina makes this also harder, but I was wonderin’ if there are any tips to go head to head against a dude with a shotgun or tactical-12 when they have ammo? I usually try to make them go into reloading then start doing mid distance shooting. I prefer using the minigun, the ghost gun, the tactical-12, the shotgun, and the mag-charger. Also, which gun has the fastest melee attack and does it do more depending on the gun?