For what it's worth, on 400 deca, 300 test, 50 anavar and feel great, great gains, minimal sides and increased libido!
So not everyone needs 2x the test
On a side note, I ran deca by itself on by week 4 I was a wreck... Severe depression (and I'm never depressed), crying like a baby at silly shit. I would never run it without some test,,, took me about a year to recover