They are still being tormented 1000 years later when Satan and the unregenerate join them. Together, they are all tormented day and night forever and ever. The Beast/FP are mere men. They are not the exception to the lost rule.
Rev 20:10 And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet , and shall be tormented day and night for ever and ever.
That verse says nothing about those cast into the lake of fire at the last judgment.
And what is to be tormented
day and night into the eons of the eons?
Rev 20:11 And I saw a great white throne, and him that sat on it, from whose face the earth and the heaven fled away; and there was found no place for them.
Rev 20:12 And I saw the dead, small and great, stand before God; and the books were opened: and another book was opened, which is the book of life: and the dead were judged out of those things which were written in the books, according to their works.
Rev 20:13 And the sea gave up the dead which were in it; and death and hell delivered up the dead which were in them: and they were judged every man according to their works.
Rev 20:14
And death and hell were cast into the lake of fire. This is the second death.
Rev 20:15 And whosoever was not found written in the book of life was cast into the lake of fire.
Building a doctrine on one verse is unwise especially when dozens of verses disagree with your view and it is not clear that the beast and false prophet are tormented, but only that they are there where the devil is.
LA