how to sitesearch effective ?

[Boron]

i know there a 3 ways of site searching :
1. search sites through units ( best with rainbow pretender )
2. spells which reveal all sites of one colour like dark knowlegde
3. accashic record

accashic record is really good but only arco , pythium and ryleh ihmo really excel at it and can rely on it .

atlantis , caelum and jotunheim excel at clamhording but have no astralmages . so you need to take at least astral 3 on your pretender . but most likely you would have better things to do with your pretender than letting him cast accashic record quite often .

if you instead search with your rainbow pretender first depending how many points you spent on him you find about 50-8x% of the magic sites with him i guess depending if you have level 1 , 2 ,3 ,4 in all / most paths .
second this is time consuming : 2 turns per search . and with high indeps you don't expand at turn 1 probably so when everything goes really well you have searched 10 times at turn 25.
but it is dangerous since most good rainbows are very weak . so after turn 25 letting him search in border provinces is dangerous .
if you are very unlucky you even could loose your pretender because of a random event attack of barbarians or something similiar .


if i search with e.g. dark knowlegde .
it says it reveals all death sites .
there are many sites which produce e.g. 1 death gem and 1 gem of another kind .
so do i find all sites where 1 kind of the produced gems is a deathgem ?
sites like gold mines and so on are they found always the time the province is conquered ?

how many sites are holy / unholy ? i just want to know a rough percentage value
are there some really good holy / unholy sites which give many gems which i don't want to miss ?