Make sure one of you has a wake scanner because he will invariably high wake to another system before you can finish him off...be sure your wing beacon is on, scan his wake and follow him while his shields are low/down and re-interdict and your wing man should drop straight in on you
Sorry if this is teaching you to suck eggs but there is nothing more infuriating is building yourself up for revenge then failing because you don't have the right equipment on board
I look forward to the video
Don't worry, I have planned ahead. Interdict module on the python (my Anaconda is too sluggish in cruise) and wake scanner. If he logs out we'll punish him for it