I personally dont' think any of the battlions are worth it, Rob made a comment on the Honest Wargamer that made me think, if you can't participate in the activation wars then why bother? sooo with that in mind i'm not running endrinriggers, it would be ****** to charge them but you always attack last.
Instead i'm going full shooting and choosing Barak Nar over Zilfin, this way my army can focus on 3 things, shooting, unbinding and movement and with new point reductions you can fit 15 thunderers, 30 arknaughts and 12 skywardens (with drill canons) and 2 khemists giving the army a triple threat. Make that opponent decide which of the shooting units is more a threat. Having all the heroes being able to unbind and with a +1 is nice...