Its all about how many hits you do over the turn.  Shooting AP3/AT5 weapons at AVs isn't going to net as many hits.

If you can shoot all your AP3 weapons at infantry, and all your AT3 weapons at AVs then over the turn(s) you are going to do more damage.

With a mixed load (especially VMB/TLD) you are nearly always going to be shooting something on "5s" (except LVs).

Might seem a bit nit-picky, but this is min-maxing we are talking about  

(P.S. The reason I wouldn't use a dual load is BECAUSE of the "lack of discount", I like to keep my warhounds cheap so nearly always use the standard load, plus the best dual load would be 2x TLD and that gets way too expensive)

is the idea of making emperor class battle titan multi activation formations still on the table or is the idea dead? i remember moscovian kicking the idea around and i rather like it.

Very much in cold storage.

The single unit stats we're currently playtesting have had good playtest reports, and additionally have the benefit of not breaking the core rules like a multi-activation formation would.

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Currently doing a plastic scenery kickstarter

fair enough, i guess ill just stay the silent minority on this one.