Not sure if these tips will help but here goes nothing...
Trim your armpit hair. The #1 (#4 for longer but still somewhat trim) attachment should work pretty good, if you are a guy. Plus you will only have to do this probably monthly so not bad, and it will feel a little more hygienic (according to my hubby)
After you shower pat your pits dry, allow them to dry completely, then take some Virgin coconut oil and rub into your pits, allow this to completely soak in (30 mins or so). Once the oil is completely soaked in and your pits look dry then put on deodorant. The coconut oil helps with the odor as it is antibacterial.
If you don't like deodorant look into making your own out of coconut oil, baking soda and I think is corn stach, go to YouTube and research diy deodorant. Many variations on how to make your own. A lot healthier than all those chemicals in regular deodorants. This will help with the smell, but not with the sweat since sweat is a normal thing your body does anyway, and modern deodorants keep it from doing that with the anti-perpirant built into some.
Again not sure if these tips will help but I hope they do :)