In all cases while I've run the sim I've found that I'm able to maximize my DPS by setting the "cast LS only if charges left" field to 3. The difference in DPS between 0 and 3 charges, though, has never been greater than 4 dps.
I found it interesting, however, that increasing the refresh charges above 3 results in a net DPS loss. I tried setting the field to the max(9) in order to force the sim to refresh LS every time a free GCD was available. In doing so, I lost almost 100 dps.
My assumption is that refreshing LS constantly results in the GCD running into other abilities' cooldowns causing a net DPS loss. So, in ideal circumstances, we would want to avoid refreshing LS unless our charges are down to 3 or 4.
Does anyone have additional insight or a different experience with this?
well you should not be seeing a decrees imo from refreshing when ever you have a extra CD in game. but what i image in your running into on the sim is that its seeing SS/LL as on cool down even if it only has say .1 sec left there by adding 1.5 additional cd to your LL/SS. while i cannot conferm this(since i have not seen the code for that part) i have also not seen an option in it to not do LS if the cool down on LL/SS is shorter then 1.5 sec less could have over looked it.
also i find that the highest dps rotion in my sims consitently with diffrent specs and gear lvls has always been