The preamps on the Saffire are pretty hot to begin with, it's fine for pretty much everything except snares (especially snares!) or toms where you are getting a real hot source (drums are the only problem here really). Usually an interface will have a -20dB pad built-in to help with this, however for some reason Focusrite decided it wasn't necessary (fuckers). So, instead you have to get one that goes in-line with the mic-cable-interface to drop the incoming signal by 20dB (or more or less) so you aren't clipping even with the preamp gain on 0.
So, it will be mic-pad-cable-interface or mic-cable-pad-interface, or some will go mic-cable-pad-cable-interface, it all depends on which one. I used
this one many times and no issues. And for $20 it's not bad
I only had two, one for when I mic'ed a snare and one as backup or for other things. Usually I didn't have issues with toms/kick/etc., besides I usually ran those through my 8Pre which has built-in pads for each channel.