I use 5 dedicated pc's for pve @ pvp but the only boxing software i use is keyclone and jamba
It's very simple yet sometimes very hard, if my main dies i quickly check who is up and target with main then tell all slaves to focus that target as i'm switching to them via KVM then i have full physical control of the master and on we go rinse and repeat etc granted this is not the best/ fastest way to do it and you need to no your toons names position in group with relation to your kvm
This way to do it i would say isnt the best for a die hard pvp player as its just not fast enough and takes a hell of alot of consentration to get it right each time but it works it just takes some fiddling