What barrel length and gas port location ? ... what recoil setup ? Rifle ? Carbine ?
And considering the suppressor will increase blowback pressure and gas volume, I would want the bolt to remain locked closed as long as possible as well... so I would probably increase the buffer weight and use a stronger recoil spring.
FWIW, I run heavy recoil setups on all my Large Frame AR's and an SLR Adj. GB , no suppressor, they all recoil very gently. With a far less abrupt cyclic speed / impulse compared to OEM. All My SLR Adj. GB's are set around 6 clicks open of the available 15. YMMV , depending on your setup.
And the rifle setups use a 9.3oz 308 rifle buffer weight, with a Tubbs 308 Flatwire.
The Carbine stocked ones, also use a Tubbs 308 Flatwire, and dependent upon the Carbine stock pattern used, the buffer weights are around 5.3+ oz.
Obviously gas port size and location will be a factor as well. That's why I asked about your setup.
And FWIW.... I have various barrels from numerous manufacturers ... only the Krieger has what I would consider a "proper" gas port size for its gas length used.
Buffer weights will "help" , but ultimately your gas volume / flow will dictate the results.... in other words, if you don't limit gas flow, all you will be basically doing is banging around a heavier buffer weight with a heavier spring weight at a slightly lower cyclic speed.