Ah got you. Sounds like you are overpronating when you run, as you mention your ankles turn in. Most people tend to land on the outside of the heel so that wear you get is fairly common no matter what gait you have.
your left foot sounds like it needs more support from the trainer than the right, you ideally need to let the foot that overpronates have the support it needs, unless there is a massive difference. I would guess that your gait starts to deteriorate slightly as you run for longer, hence the 'rolling gait' you mention, so a bit of extra support for the right foot definitely wouldn't hurt.
Asics shoes can cause blistering problems for me on the inside of the foot, where my foot rolls into the support. I think it is because they aren't quite the right shape shoe for me.
If you can get to a shop, ask that you can try on at least 3 or 4 different brands. I would recommend for narrow feet Adidas and Puma in particular, especially the older models of Puma. Nike and New Balance may also be worth a try. As for specific models, without being able to see your feet I wouldbe nervous of recommending a type of shoe, go on the advice of the people who see your feet. Maybe though you could look at shoes that don't give quite so much overpronation support - more support is definitely not always a good thing, otherwise we would all be running in Brooks Beasts or similar motion control monster!
Its so difficult to advise on the level of pronation you should go for, unless I looked at your feet, and watched you run. If you can get to a running shop,