I'm going with 90 plants in 2 gallon buckets on a 12 foot long by 5 foot wide table with six 1,000 watt hps over it. I'm aiming for 1.25 oz a plant
you are aiming to get over 7 lbs in an area that fits about 4 lbs and you are using 6 1000 watters in a spaces made for 2 1000 watters and you are trying to go by calculating per plant weight... good luck. in 2 months you will be back wondering where you went wrong.
you are gonna get very bad gpw (or how i like to say gram per 1000 watter)
with that much light you are using you gonna have do much heat trouble and shit that you won't even yield what you could have in the amount of space that you are using.
its better off you make 3 12x5 rooms and split those lights up. after this basic shit i just told you. comes how you can manage the rest of the grow. if you do ok you should get 6lbs minimum if you do good you might get 8 if you the shit then you might get close to 12( 12 meaning you have everything perfect with c02 and all that good stuff.)
If i used your logic which seems to say, "more lights equal more weight" why don't you just use 6 in a 5x5 table. sounds dumb doesnt it. Im not trying to shit on you bro, but when i was learning i had to filter all the bs advice from people saying similar things to what your saying and it seems that basically everyone on this forum makes it seem as its true. Hope you realize this and rethink and redo your grow before you mess this one up and spend so much on a learning curve.