If you take internet and power with Slingshot you can get the rates below for internet.
Seems you actually have to pay weekly or fortnightly to get the below rates but I have added the equivalent monthly cost as I'm sure that must be how others also factor in their head
Unlimited Naked ADSL, VDSL
Weekly - $11.03 ($47.80 per month equivalent)
Unlimited Naked Fibre (200/20)
Weekly - $10 ($43.33 per month equivalent)
Unlimited Naked Fibre Gigantic (900/450)
Weekly - $13.10 ($56.76 per month equivalent)
EDIT: I have re-run the numbers below to account 10% discount that you get with Slingshot power when you bundle with internet..
Now their power kWh rate appear marginally cheaper than I am currently paying with Meridian however they list it excl GST, so it's actually marginally more expensive..
Meridian 0.2794c per kWh incl GST
Slingshot 0.2880c per kWh incl GST (after 10% discount for bundling)
At the 704 units I used this month I would be paying $6.02 more (High usage because of lockdown)
At the 444 Units I used last month I would be paying $4.39 more for power.
I am currently paying $80 per month for Bigpipe ADSL Internet so I would still be ahead overall (by $27.81 Last Month, $26.18 this month) but it very much depends what you are currently paying for power, what you are currently paying for internet and how much power you use as to how good of a deal this is for you.