You should play around with the dns things.

say from host A .. named as enginea.yourdomain.com
say from host B .. named as engineb.yourdomain.com
and from host C .. named as enginec.yourdomain.com

the easy way is you put only one SOA for your domain,
however you can also put some SOAs in each host ... ( make sure you name it differently .ns1,yourdomain.com, ns2, ns3, ns4 etc.. and configured the dns to replicate each other, you can do this by configuring primary dns and secondary dns, and the secondary dns feed from primary dns. )
and put all of your dns engine to your registrars ....

I can do it if I own the dns and the hosting ... :-)

I don't know yet ( never try using resellers account :-) ) ... you have to ask your reseller providers

HTH