The detail on levies on your post is unclear. From dim memory there is a calculation of around .8 to 1.5% p.a. of the value of the property. You also need to take in account service offerings by the owner’s corporation. e.g. how many lifts, concierge service, security, pools, spas, gyms, gardens, bbq areas, common areas footprint size (paint, carpet, maintenance), infrastructure – pumps, cooling towers, ventilation, distribution boards, TV aerials, communications etc.
Levies often aren’t high enough for upkeep of the owner’s corporation leading to special levies because the money hasn’t been raised to deal with maintenance in a timely manner.
Check the 10 year capital works schedule for your strata plan – you should have one with 170 lots.