Yes, watts - my bad on that one. Good point on bumping that up a bit.I would suggest that the 5V (main) resistor be higher power rating than the 25W you are showing. Thw 25W power rating is a maximum, and running resistors at their maximum power rating is a little questionable. At the very least, it will run very hot, at worst, if the 5V is a little high (anything higher than 5.0V), and you are risking a burn up/meltdown or the resistor if you apply power for anything but a very brief amount of time. I would also suggest that you up the power rating on the +12V also be raised, and would think that the resistors for the -12V, -5V for those rails can be safely reduced to 5W, or even lower. Does the Lisa actually have a +33V rail, or is it a 3.3V rail.
I am making the assumption that the Chosen Resistor (Amps) is actually in Watts, not Amps.
As for the 12Ohm/15Watt resistor, I'd originally pegged it at 12W, but Mouser only had a 10W or 15W as the nearest values, so I opted for the slightly higher value. I may see if they have a slightly higher value, then.
As far as 33 vs 3.3, yep, it's 33V. I'm guessing that's a driver (along with the 300V rail) for the CRT chassis.