Trying a Free Spirit, Because I'm enamored with the concept and a glutton for punishment Options

[FlashbackJon]

I've read all the posts in the recent search history on the topic of Free Spirits. I understand they're just one giant ball of liabilities, but I'm committed to making this work - possibly because my GM is new to SR and not very harsh, generally speaking.

As you can see, I've borrowed basically every element from the threads in question:

[ Spoiler ]

Race: Free Spirit (Qabballistic Spirit of Task) (250 BP)
Attributes (90 BP)
B:2
A:2
R:2
S:2
C:2
I:2
L:4
W:4
E:4
Force:5

Active Skills (56 BP)
Spellcasting: 5
Counterspelling: 4
Unarmed Combat: 5

Knowledge Skills (18 Free BP)
Spirits (x): 5
Magic Background: 4
Magic Theory: 4
Magical Threats: 4

Qualities (+35 BP)
Gremlins 1 (+5BP)
In-Debt (+30BP)

Spells (15 BP)
(five spells)

Spirit Powers
Immunity to Normal Weapons
Banishment Resistance
Possession
Concealment (2)
Spirit Pact (1)
(one spirit point left)

Pacts
Friendship Pact
Power Pact

Possessions (0 BP)
Street Lifestyle
Plasteel Homunculus

Contacts (24 BP)
Talismonger (C2/L6) (to whom he owes the money - maybe his summoner?)
Qabballistic Order (C2/L6, 20-99 members, Sprawl-Wide, most members have magical talents)

I like the end result, but it's sort of schizophrenic. He was initially intended as a backup caster, and his stats suggest that, but I really like the idea of a bruiser golem now, too (thematically appropriate, yay!) and his physical stats DON'T back that up (10/1/1/10 in his homunculus). The other benefit is the GM is playing a GM character in case someone else wants to take over (we've never had any of the problems most people associate with GM characters) - to make his life easier, I can always simply possess him.

I'm looking for suggestions and recommendations (OTHER than "don't play a free spirit" or "use karmagen") for either balancing this guy out to specializing him further. Attributes, spells, powers, etc. Any way to make him better.

P.S. I included the "group contact/karma factory" thing, but I won't be abusing it. I just like the added story elements and the safety net. I thought maybe a Loyalty roll at the end of each adventure for a little extra Karma or something.