What is the most effective of medic's supercharges?

Which is the easiest to attain?

"we that are young, shall never see so much, nor live so long." the weight of this sad time we must obey, speak what we feel, not what we ought to say. the oldest have borne most; we that are young shall never see so much, nor live so long.

explanation:

domes and arches have a specific esthetic look and feel. that is very important in architecture. churses and cathedrals are usually also large spaces and arches and domes is a good way to distribute the weight so that the rooms can be larger to hold more people. they are also beautiful and can be in many different forms so the architects can create art with them inspiring feelings in people.