Thanks for your question, I don't have any experience with A10 myself that I can remember but generally I would recommend testing the load balancer with your application and the Grid. I would recommend reaching out to your System's Engineer or NetApp partner for advice and considerations for implementing this.
The biggest problem I ever had with a load balancer was with SSL and sticky sessions. I would say which ever option you choose look out for this.
We also offer a virtual appliance load balancer included with your StorageGrid license if you wanted to test that option.