Talk:Excalibur (Warframe)/@comment-93.186.16.212-20130627192346/@comment-1627247-20130628134035

It depends on your build.

If your own build includes Focus and Continuity, then keep the 2 V slots and forma a D slot.

If your own build only includes Focus, then forma one of the V slots to D or -.

A D slot is always worth it due to how high D slot mods cost when they are maxed out.

Basically, you want mods which cost a lot to be put in polarity slots since this will then half their cost and indirectly give you half their cost in points more than the original 60 (technically).