Preferred Coolant Temps

What's everyone's preferred coolant temp at the line? My current combo might be too efficient as I can't seem to get the engine up to temp unless I turn off water pump and fans.... lol

Here's my combo.
408 aluminum headed stroker
26" Aluminum radiator with shrouded electric puller fan
Meziere HD electric water pump
No thermostat
Straight non-glycol racing coolant

I can idle the car forever with just the pump running and the temps will barely get to 150-160. With the fan on, it will drop to 135-140. We made about 10 pulls on a chassis dyno and I had to keep switching the fan off to get the engine temps up. Granted it is getting chilly here so I am keeping ambient temperatures in mind but I really don't anticipate too much difference in the summer.

Thoughts?

Thanks, Bill
You'd want the oil over 220-260f and the coolant about 33f but neither are realistic. So, if your chasing a tune-up keep oil temp consistent and near 200 and settle for the coolant temp at a reasonably achievable LOW value.