Runemaster Rune Bolt Interaction

Currently planning a build and seeing if any uniques mesh well with the new abilities. Anyone know how the Unique “Abacus Rod” interacts with Runebolts masteries? If you take the 2 masteries that convert the ability to only lightning will the Abacus Rod override that or does the mastery take precedence?

You probably already know the answer to this, but in case someone else comes looking:

The skill tree overrides (i.e. applies sequentially and second). Or a more detailed explanation:

  • Cast cold spell
  • Cast runebolt.
  • Abacus forces it to choose cold, however assume skill tree converts cold->lightning. A lightning runebolt is thus cast.