So I have settled on a Sage/Figment Familiar.
With DM Approval it has been allowed that the Familiar gains Skill ranks for its HD (I think that is the right terminology)
Anyway, as it is stated Here.
Now my question is, how many Skill Points does a Bat Sage Familiar get with a level 5 Master?
It gains 10 Ranks from
Sage’s Knowledge (Ex)
Its intelligence is 10.
So with 5HD Does that get another 10 Skill Points?
The way Mark describes it, yes I guess so. 2 per level from sage and 2+int per level from effective hit dice.
That isn't the ruling I would expect honestly. Animals have their own skill ranks from their hit dice already, and would normally inherit skill points from their master. With his ruling you aught to be gaining the 2+int skill points per level from the animals effective hit dice even without the archetype and add those on top of those inherited from the familiar's master.
My expectation would be that a bat sage familiar with a 5th level master would have 2 skill points from it's one animal hit dice, and 10 from the sage bonus.
With DM Approval it has been allowed that the Familiar gains Skill ranks for its HD (I think that is the right terminology)
Anyway, as it is stated Here.
/.../
So with 5HD Does that get another 10 Skill Points?
Hm? Mark Seifter stated the opposite of your interpretation though.
It gains the benefits listed; 2 skill ranks per (master's, as per the intro on familiar archetypes that explain what "level" means) level. It would still add its Int bonus to the ranks it got from its creature HD, but not from the special sage ranks.
So the Bat familiar with a lv 5 Master gets ten ranks from Sage's Knowledge, and two ranks from having one creature HD with a Int mod of +0 on a two ranks/HD progression.
I think part of the confusion is from the familiar’s hit dice ability. It is widely accepted that “effects related to number of hit dice” does not include things like gaining skills and feats.
It absolutely applies to external effects that target the familiar like sleep. And potentially applies to the familiar’s own hit dice based abilities like poison save DCs, but opinions are split on that one.