just test alone?
I tried it as an experiment about 4 years ago. I took an amp of Karachi plus 1 every 7 days for 8 weeks so my total was 2g a week. no other anabolics.
to be honest it wasn't as good as using a lower test and going with tren another such anabolic to round it up to the 2k mark. I found I held a shit ton of water. my strength wasn't as good as running different compounds together at that mg dose. basically I was big but looked like shit.
that being said I wouldn't suggest it to anyone else, bother with or waste my time with a 3-4g test only cycle. you'll get far better results combining compounds to reach that mg total.
guys need to wake up and realise test alone is not the holy grail. in fact you'll make far better quality gains using far less test and far more other anabolics.
cheers.