Yes Any energies can be taken by different routes or ways at the same time.
Both ways will work and will be effective.
The time gap is for same method, to allow the energies to accumulate and reach the organs and situations.
Like for different water, its a gap of 10 min
Other ways,,,,,around 30 min
When you apply cream the energy stays and works through the skin.
If you have 2 VKs, you can still send different energies to the same person at the same time, requesting each of them separately.