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How to improve the performance of AB output?

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eda_range

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Hi,guys!
While doing my op-amp design, I found the sourcing and sinking ability of my AB output was poor, the current is around 40mA far below requirement.
How to improve this performance?
Thank you in advance.
 

AB output

maybe you can enlarge W/L ratio of output drive NMOS and PMOS..to get high current but if L changed the open-loop gain will change.
 

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    eda_range

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AB output

Thanks, but could you tell me if any modification could be made toward this output to enhance this performance without enlarging W/L?
 

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