Let me start by saying "Yes" to both of your propositions...now,
This question dates back to 2005...and we're still answering it. If you're an RPGer, think of the total number of successes to defeat an AO as a set number of hit points = Highest Number on the Doom Track x # of Investigators. Thus, an AO with a Doom Track of 10 in a game with four Investigators would require 40 successes. If in any given turn, remove a Doom Token for every four successes and simply remember how many additional successes were scored but didn't remove a Doom Token.
Example...Yig in Final Combat with four Investigators. The Investigators score nine successes...thus, remove two Doom Tokens (one for each four successes) with one more success. I personally use the "1-3" counters to identify how many successes are required to remove the next Doom Token. In the next round, the Investigators score six successes. Immediately remove one Doom Token for the set of four successes and you have two remaining successes. Adding those two successes to the previous round's one success, you have three of the required four successes to remove another Doom Token.
Edited by The Professor, 15 September 2013 - 06:31 AM.