Just to correct some misconceptions. Servant's soul connect doesnt give half but full of the stats but only reduced by half in the status screen.(I tried this with 150 agi servant and you still get full attack speed to a person with 0 agi) but there is a limit to what you can pass base on level. Lvl 1 256 Lvl 2 301 Lvl 3 356 Lvl 4 400+
And its correct that the max you can get is based on your apostolia level. Ex. You have 301 int and apos level of 98.The connecting servant (int 356) can pass you with SLC 3 356 int point but you can only have a max of 354.
And afaik, equipment doesnt affect the passed points. Only from the status screen itself.
I think the info on soul connect is based on old info.It was reworked when they released the 260 skills.