So, you're suggesting that I visualize my lama in his ordinary form without the red skin, etc. of Amitabha?
No. I am suggesting that these are of secondary importance.
It is also possible to practice guruyoga directly with the deity, but it is much more beneficial if one integrates
one's own present guru and the whole lineage into it.
The essence of the practice is to recieve the wisdom, the blessings and the protection of the deity and to integrate oneself with the whole lineage. Yes, the visualization is important, but even more important is to actually feel
the presence of the deity, the lineage masters and their blessings. It IS
a living tradition, a reality, not something abstract or imaginary.
But yes, technically, the idea of the visualization is to see the deity in his form with as much clarity as possible, and to integrate into this form the physical appearence of one's own present guru.
Probably you have had dreams where a character was two persons at the same time.
It is something similar to this. It is more this kind of mental state, not logical thinking.