Arcane Marksman costs double against Ward hits

[Karlito]

This is related to, but apparently distinct from the fix prompted by my previous report. Hits against faction wards are currently costing 6mp, but misses against wards and attacks against barricades are the correct 3 mp. This behavior was also present when the base costs was wrong, but it took me a few days after I wrote that post to really understand what was happening.

[Kandarin]

There's now a working fix for this.