Now I know what exactly your problem is. The 1.5 seconds were just an example. The discharge times vary considerably from one setting to another. Here is a list I posted previously on an other thread:

level 1 0.25s
level 2 0.75s
level 3 1.025s
level 4 1.5s
level 5 1.5s
level 6 1.75s
level 7 1.75s
level 8 1.75s
level 9 1.5s

from level 9 on discharge times drop again

As you can see you would theoretically be able to dire 24 shots on the first setting. I decided to go with a much lower value since I didn't want to have phasers practically firing in autofire mode.

I never intended the RoF values to be used as a basis for determining whether it is possible to use a continuous beam to cut through obstacles. Although I admit this would be the logical conclusion.

I'd say that a type II can use the "cut" settings until it runs out of power, a type I might be more limited.

And I noticed one terrible mistake I made ( at least terrible for the CODA users, I hope those still using the ICON rules will protect me ) I calculated the RoF values based on 5 second rounds, not the 6 second rounds CODA uses. I'm sorry.
I intend to fix this, but I won't have access to my own computer for 1 week, so you'll have to wait until then.