Post IPO sell strategy?

To all the experts out there,

Just wondering what's your best way of selling IPO after it listed? Selling through the said IPO broker (% cut) seems expensive.
Transferring to say Commsec (flat fee) takes around few days.
Selling through say Commsec using Issuer Sponsored SRN? But is there a way to know your SRN straight after IPO listing?
Or selling through brokerhouse as they are worth its salt?

Or do you hold long term ?

Any tips?

thanks