There are several features of Rev 14:9-11 that are sometimes missed:

• The torment is not described as eternal - only that smoke from the torment rise eternally
• The torment is in the presence of the holy angels and the Lamb. IF this torment is understood as in hell (location actually not mentioned) then the holy angels and the Lamb are also in hell for the duration of the torment.
• The destruction described and predicted/prophesied in the third angel's message of Rev 14:9-11 is an anticipation of that actually occurs in Rev 20:9 -

And they marched across the broad expanse of the earth and surrounded the camp of the saints and the beloved city. But fire came down from heaven and consumed them.

This appears to be a direct, verbatim quote from 2 Kings 1: 10, 12, "And fire came down from heaven and consumed [them]".

This is consistent with the description in 2 Thess 2:9, "[the wicked are] punished with everlasting destruction from the presence of the Lord, and from the glory of his power" and with the comments in Jude 7 -

In like manner, Sodom and Gomorrah and the cities around them, who indulged in sexual immorality and pursued strange flesh, are on display as an example of those who sustain the punishment of eternal fire.

Eternal Smoke

This leaves the problem of eternal smoke as mentioned in Rev 14:11, "And the smoke of their torment rises forever and ever." I think that if John wanted to say that the wicked are punished for ever with the Lamb and the Holy angels with them, watching, then it might have been a simple matter to have said just that. However, it is the result of the fire, smoke, that rises forever - the result is eternal and the lessons never forgotten. See Nah 1:9.

There are several features of Rev 14:9-11 that are sometimes missed:

• The torment is not described as eternal - only that smoke from the torment rises eternally
• The torment is in the presence of the holy angels and the Lamb. IF this torment is understood as in hell (location actually not mentioned) then the holy angels and the Lamb are also in hell for the duration of the torment.
• The destruction described and predicted/prophesied in the third angel's message of Rev 14:9-11 is an anticipation of that actually occurs in Rev 20:9 -

And they marched across the broad expanse of the earth and surrounded the camp of the saints and the beloved city. But fire came down from heaven and consumed them.

This appears to be a direct, verbatim quote from 2 Kings 1: 10, 12, "And fire came down from heaven and consumed [them]".

This is consistent with the description in 2 Thess 2:9, "[the wicked are] punished with everlasting destruction from the presence of the Lord, and from the glory of his power" and with the comments in Jude 7 -

In like manner, Sodom and Gomorrah and the cities around them, who indulged in sexual immorality and pursued strange flesh, are on display as an example of those who sustain the punishment of eternal fire.

Eternal Smoke

This leaves the problem of eternal smoke as mentioned in Rev 14:11, "And the smoke of their torment rises forever and ever." I think that if John wanted to say that the wicked are punished for ever with the Lamb and the Holy angels with them, watching, then it might have been a simple matter to have said just that. However, it is the result of the fire, smoke, that rises forever - the result is eternal and the lessons never forgotten. See Nah 1:9.