mmmmmmmmmm russian mmmmm strawberry shake
your figures are seeming unrealistic to me,
white russian and bgum tend to shoot up a bit during bloom, you wanna give them 2 months veg, 2 months veg on these babies will give you a mega yield, but then with 2 months veg your not going to gain anything other than potency, normally 2 months veg over a months veg should drastically increase your yield, but because you have a single 600w lamp, its doubtful you are going to utilize this extra vegative growth, russian is pretty branchy and likes to spread out a bit, so to get them under your light your going to have to trim branches off to keep them tight, so you kinda lose any extra yield you would have gained.
if you were to roll with say the whole 11 seeds you get in a pack to aim for the best 4 females the extra veg time will make a substantial benefit.
ak47 and white russian can be easily grown at the same time as the structure of the plants are very very similar the only real difference is the taste of the bud and the appearance of it
i personally would advise against either of those two mixed with bgum as the bgum can get unruly and can stretch a lot more than the others adversely effecting your canopy and then its a choice between burning the tops of the bgum or having the light a little too high for the others.
chronic is great for yield but the taste can be quite subtle
bubblegum is still a decent strength smoke and i would be hard pressed to choose a favorite between that and russian and ak, they all have high thc levels and different flavors and i love them all