My last one I had 2 SoB, 2 SoG, and dualgunner, and took out one of them before the other got in melee and just wrecked me. Rapid fire builds are good, but I can rarely make it to the midgame with them to get to the point where they actually work. Melee builds are fun, but completely unworkable, i usually die by the 3rd level.
The answer is: bad build. If you take SoG, then you must take SoG 3. SoG3 is MUCH stronger then SoG2.
Also, taking Eagle Eye not a bad idea.
Speedloader pistol also good.
Playing technician is good for fast medpacks.
And for bruisers - unless you play weapon-limited challenge, rocket launcher can help, no matter which build you use.
For melee - again, if you not play AoB, ranged weapons still can help survive to Chained Court.