Is it possible to bypass org limits on platform api call volume

Is it possible to bypass org limits on platform api call volume when running a bulk sync job from our AppFoundry integration? we are hitting a wall with the POST /api/v2/integrations/user/integrationusers endpoint. specifically when trying to provision agents across multiple orgs using the multi-org oauth flow. the error is a 429 Too Many Requests with a retry-after header of 60 seconds. we are using the java sdk version 12.4.0 and have implemented exponential backoff but it is still failing after 3 retries. the payload includes standard user attributes plus custom extension data. we have checked the rate limit headers and they show we are well within the global limit but hitting the per-org limit. is there a way to increase this limit or is there a better endpoint to use for bulk operations? we are considering switching to the archivist api but that seems overkill for just user provisioning. also noticed that the error response does not include a specific error code just a generic message. any help would be appreciated. we are on the enterprise plan and have contacted support but they just pointed us to the docs. the docs say to reduce call volume but we need to sync 5000 users in under an hour. is there a batch endpoint we are missing? or do we need to implement a queueing system on our side? currently using a simple loop with thread pool of 10 threads. maybe increasing the pool size helps but that might just trigger the limit faster. also the oauth token refresh is working fine so that is not the issue. just the rate limiting on the provisioning endpoint. thanks in advance.