@Craigp yeah, basically TAK would have each job have a maximum draw, and you'd spend equally on all jobs up to maximum.
So if you had:
Job1 5 mana
Job2 3 mana
Job3 10 mana
and had an income of 20, you'd be going at full capacity. If you had an income of 15 only Job3 would be degraded, if you had 6 all jobs would be spending 2 per turn.
And yeah, this is easily my favourite model