Humalog, Humulin-R, Novolog, lantus, etc are all forms of injectable insulin. Their action in the body is to "LOWER BLOOD SUGAR"!
The main difference between all of them is the "onset time", the "peak time" and the active life which varies from brand to brand.
On the other hand, you need to rethink what you are going to say before making ignorant posts in the future. You obviously know nothing about insulin and therefore shouldnt be giving advice on this matter.
To answer the above question, i would opt for Humalog. It's in and out within 3-4hrs max which is generally a better option, however it all depends on how you intend to run it, I.E "pre-workout" etc.