Testofen is a 50% fenosides concentration of
fenugreek, so you could save some money and hassle by dropping
fenugreek from that stack. Usually
testofen is dosed between 500mg to 1 gram a day.
Some of the
other stuff will depend on the concentration you get. For instance you
see a number of different concentrations of
tribulus and longjack. I'd do some reading about that before I committed to a specific concentration of either compound.
You could add
horny goat weed to this stack and probably be well served, since most ppl. seem to really like it. There again, you'll find anything from 10-40% concentration, so be sure to check labels before you buy.
DHEA, I wouldn't bother with unless you're into your mid-thirties or doing PCT at the time.