[Edi]

1) In addition to the ones listed, other units that are also capable of healing are early era Ermor priests and the Mother of Serpents pretender that is available to some nations. T'ien Ch'i has a national hero with that can heal troops.

2) No advantage. If you've done a lv 4 search, it's just as good as 5+ search. I agree that the radar spells should set the search level to 4 instead of 9.

3) Yes, it is, but any radar spell like Haruspex, Arcane Probing etc will always find ALL sites of that type in the province no matter what. However, if you've done a lv 1, 2 or 3 search with a mage, then there is always a chance that there is a higher level site that has not been discovered yet. Sites that you can see immediately upon conquering a province (such as Mine of Superior Iron) are lv 0.

4) No, you don't. The only way to get them is that on a specific map a certain province has been set as a special start location for your nation, your nation has fewer than 4 startsites and some site has been assigned to that province in the map file. In other words, doesn't happen.

Edi