What to do with superheavy units in Warhammer 8th edition

[Aclys]

They do appear to be planning on releasing variant armigers, with either a shooting or a melee focus. One imagines this may also include options for hordemulching. If nothing else, two armigers are as cheap as you will get to fill out a superheavy detch if you cant/wont do a aux or supreeme command one