For a metal type tone I am a fan of running a ts9 into a muff. Keep the gain on the overdrive under 9 o'clock and crank the volume to where you want it. It's ztremely loud so you will have to make sure to find the right mix of volume from the pedals so you aren't quieter when you switch.

__________________
Telecaster/USA Stratocaster/Gibson LP Std>Korg Pitchblack>Fulltone Clyde Deluxe>Hermida Zendrive>Rockett Pedals FlexDrive>Hollytronics Triangle Big Muff>MXR EQ>MXR Phase 90 script RI>DMB Pedals Lunar Echo>TC Electronic Nova Reverb>BBE Sonic Stomp>Mesa Dual Rectifier>Weber MASS 100>Avatar 2X12 w/V30's

Other stuff: Alvarez MF80C, Keeley TS9 and DS-1, Devilworks Jezebel, Deja Vibe, POG2, Vox V848, Spring Chicken, Tone Bender, '68 Fender Blender, Shredmaster, Small Clone, Fender Hot Rod Deville