Really needing some advice...

[ElectricMayhem]

I have plenty of cash left to make changes: $171,600

I think I might have too many low level players?
And I'm not sure about the strength of my defence.

[maygs]

Malceski is expensive.  I'm not sure Whitecross will play early and I,m no convinced in McMillan's ability to score well.
there are other options. 
Mal -> Shaw
MacM -> Lumumba
WX -> Saad
A little more cookie, but more reliable

Boekhorst -> Cripps will prob score better for you

Martin is a POD - I hope you are right (as a Lions man myself)

Love the Roughy pick as I reckon he'll burn it up again this year.
I don't know anything about McCartin - so I can't offer much there, but you could prob trade him for a rookie and get Salem on the ground.

Check your rookies once the teams are announced.

I hope this helps