Ah, pity. Hm, well, Photosynthesis would be a fine Aspect, as something nurturing, bringing warmth and life.
As to the final Human Aspect, hm, sage, philosopher, preacher, champion.
Hm, well, one would very much like the last Human Aspect to be Sage or Philosopher, something intellectual by its very nature.
As to the difference between sage and philosopher, hm, well, in classical philosophy, a sage is one who has attained wisdom. In Plato's Symposium, Socrates stated that the difference between sage and philosopher is that sages have what philosophers seek. Continuing onward, the analysis of love was that it is that which lacks what it seeks.
In other words, philo + sophia = love of wisdom. Philosophers love wisdom and seek it, for they do not possess it. Sages, meanwhile, do not love or seek wisdom, because they already possess it. The analysis by Socrates in that context was that there are two sorts who do not engage in philosophy. One would be gods and sages, for they are already wise. The other would be those without sense, because they believe that they are wise. A philosopher is one who is between those two categories. The philosopher is not wise but is self-aware enough to understand their lack of wisdom, therefore pursuing it.
In other words, one would hazard a guess that for Lorgar to gain the Sage Aspect, he must truly gain wisdom, become wise.