Trade Winds Tripel from the Bruery is another example. However, they use Thai Basil.
I have used Thai basil a couple of times. Similar, yet different from sweet basil. But, they can be used the same.
The way the Bruery does it, and I do the same, is to use about 2/3 to 3/4 of the flowers with the remaining 1/3 to 1/4 of your total weight being the basil leaves. Roughly about 1/4 or about 7-8grams total for 5 gallons. Throw them in at flame out and steep for 10 minutes. I think using a couple ounces would be a lot! I get plenty of flavor and aroma with 8g/5gallons.
I wouldn't use over 1/4 oz hops as a late addition, probably something with some citrus notes. Mainly just a bittering charge for most of your IBUs in the 20-30 range.
So for a DME recipe to make a Belgian golden-style ale would be roughtly 80-85% Pilsner DME/LME and 15-20% sugar.
Lemon, wheat, and honey could be used as well. You are only limited by your imagination
I made a Thai-spice fusion saison AKA Thaison with Thai basil, kaffir lime leaves, corriander, lemongrass, and ginger. It tastes fantastic!