Ultimately Peter, I don't believe there is a single correct answer to what to asked. Those factors can all be good and bad, for instance, one of my favourite 'gospel' factors is barrier draws. I like horses starting from unfavourable draws myself and do okay from them, and enjoy laying those in good barrier draws (obviuosly theres more to it than just the barrier draw), but I'm sure there just as many if not, who only consider the favourable draws to back, and lay the outside barriers.

Really, I dont believe there is any form factor you can say is rubbish and totally discount, its more a matter of trying to take all the info into account and making trying to make the right decision.