Per the iron legion website:
Invictus: .5 mL AM and PM
VII-KT: 1 mL AM and PM
With 30 mL in each bottle, the invictus should last a full month while you will need two bottles of VII-KT to last the full month. This is why they offer the "3 bottle stack" which includes two KT and one invictus. I ordered these over the holidays and am awaiting them in the mail to give them a shot.
These will be my first time using any sort of topical application. I think I saw someone saying using a ziplock bag on the hands to apply, in order to minimize the absorption in the hands so it can be absorbed in the more optimal locations such as the neck where you are likely applying it. Any other tips/tricks?