X-over chart
Families that are taken (and names given during introduction):
Destiny's Childe (becomes Sorcerer) Xander, Oz, and Spike.
Family (stays Family) Xander, Oz, Spike, Kaiya, Wes, kids (4)
Alignment (Brandon's) Xander, Oz, Derek, Nick, Philip, Buffy, Alex, Giles, Methos, kids (6)
New Things Series (Sentinel/Guide) Xander, Oz, Blair, Jim
GHS (Dancing) Xander, Oz, Giles, Methos, Ray, animals.
ALL GET SENT TO THE PLAYGROUND REALM, THEN ARE SENT TO THE FIRST HOUSE SWITCH, EXCEPT CHILDREN, WHO END UP ON OLYMPUS:
1st House Switch:
TO GHS:

Sentinel Xander
Dancing Oz
Sorcerer Oz
Brandon's Oz
Brandon's Derek
Brandon's Alex
Brandon's Nick
Brandon's Buffy
Brandon's Giles

TO FAMILY:

Sorcerer Spike
Sorcerer Xander
Family Spike
Family Oz
Dancing Xander
Guide Oz
Brandon's Philip, comes late

TO ALIGNMENT:

Family Xander
Brandon's Xander
Dancing Giles
Family Wes
Family Kaiya
Sentinel Jim
Guide Blair
Brandon's Methos
Dancing Methos
Dancing Ray

2nd House Switch:
TO GHS:

All the animals, eventually.
Dancing Oz
Sorcerer Spike
Family Kaiya
Family Wes
Guide Blair
Sentinel Jim
Brandon's Buffy
Brandon's Alex
Brandon's Methos, who moves during this switch to Family
Dancing Methos, who moves during this switch to Family
Dancing Ray, who moves back to Alignment house

TO FAMILY:

Family Oz
Family Spike
Brandon's Philip
Brandon's Derek
Brandon's Nick
Dancing Giles
Brandon's Giles
Sentinel Xander
Brandon's Methos is moved here during this part of the story
Dancing Methos is moved here during this part of the story

TO ALIGNMENT:

Sorcerer Xander
Sorcerer Oz
Brandon's Oz
Brandon's Xander
Guide Oz
Dancing Xander
Family Xander
Dancing Ray is moved here during this part of the story

3rd House Switch:
TO GHS:

All Animals
Dancing Xander
Dancing Oz
Family Xander
Brandon's Buffy
Brandon's Nick
Brandon's Derek
Brandon's Philip

TO FAMILY:

Family Oz
Family Spike
Sentinel Jim
Guide Blair
Sentinel Xander
Guide Oz
Dancing Methos
Dancing Ray
Brandon's Methos
Sorcerer Spike
Family Kaiya
Family Wes
Sorcerer Xander.

TO ALIGNMENT:

Brandon's Xander
Brandon's Oz
Brandon's Alex
Brandon's Giles
Dancing Giles
Sorcerer Oz