for the rock stuff I always run 2 amps (Boogie Studio 22+ /Sovetek mig 50 through Marshall 4x12 slant) , and a TC stereo chorus/trem/flange as the splitter ..usually set to a mild trem.
For my fiddle I run a biamp with the top going to a mesa rosette , then effects send to a T Rex quint set for 1 octave down so I get Cello to Violin range on my 5 string .. .to a GK 800 bass amp ..1100 watts of juicy tone.