Just an update and my opinions on the bj spacers.I would only go as far as the 15mm bj spacers as it takes so many mm's shims to bring the camber back.Mine still isn't perfect but not far off.I have now got 15 mm of shims fitted to bring the camber back and think i may have to go another couple of mm or so.If your happy to go 15mm bj spacers or more then please be aware of the amount of camber shims that will need to be fitted.
THIS IS JUST MY OPINION BY FITTING 15MM SPACERS AND HAVING A MAX 30MM LIFT ON THE BALL JOINTS

what is mitsubishi's recommendation for maximum shims?

i think 8-10mm but my truck handles ok with 15mm of shims and i have driven it over different surfaces etc with no propbs.
It is down to the individual on what shims and spacers they fit but after doing mine this is the max i would recomend going although it may be over mitsi's recomendations