Increasing the security log with FSCT (File Server Capacity Tool)

I need to make an small system for Fault Reappearance. 
I have been changing parameters in profile.cfg file of FSCT to meet the requirements below but it has never reached expectation.

# Requiremens
  - 500MB/min log should be written to the security log(eventlog)
  - Set volume D to audit sucess and failure events in Fileserver.
  - Set quota for the directory of security log(%SystemRoot%\System32\Config) in Fileserver.

# FSCT(v1.2) components 
  - 2 clients
  - ActiveDirectory (created 3500 domain users for fsct test)
  - FSCT controller 
  - File Server ( volume D: 200GB with audit of success and failure and Quota setting)
   (Windows Server 2012 R2 x 5 on AWS / Clients: c4.2xlargec, AD: t2.micro, Others: c4.xlarge)

# profile.cfg
 - wordfileopen 500
 - wordeditandsave 500

# result
 - security log 300MB/300sec
 - CPU utils (maximum) around 40%

I'm not sure increasing some values in profile.cfg would be efficient.

I'm also wondering security log would be bigger if I add more users in the domain.

Best Regards,
Kazuo Ieiri