I second the poison Their heaviest armor is a 5+ on their great weapon guys.
If you want a multi-wound weapon we have the Piranha blade or the ever expensive Blade of Realities.
For killing a character, Bane Head + Piranha blade is a particularly nasty combo, 1 wound can almost kill any of their characters, but only works against one of them.
Edit --------
I'd use Razordons instead of Salamanders. The slightly higher strength will help out a lot more and can hit many more times than a template on large base models.
If you do use salamanders, shoot w/ your skinks first (until one has 1 wound left), then drop the template, the template only does one wound and can't kill an ogre outright for the panic test w/o them being weakened first.