If this is the case he needs FAQed because it is still unclear if the D3 (for cyber steed) or the +2 for rage takes priority...but also means he either has a useless piece of wargear or a useless special rule.
Problem is...
...that while your example is logical it is somewhat contradicted by the BRB on page32 "a character cannot gain the benefit for a special rule more than once. However the effects of multiple special rules are cumulative."
2x different special rules both modifying the same value=cumulative (currently in RAW anyway) unless someone can clear this up?
Logic and rules do not always interact.