Alright guys, results are in, with one ss, since i accidentally deleted my screenshot folder.
Overall, LB spam came on top of castsequence, by a pretty good amount, i would say good 2k dps on my best geared shaman(on some bosses), yes I didn't believe it first, but its seems like lb spam>castsequence, for now.
Il get some more ss, but my usual dps would be around 4-4.4, depending on the boss(otherthan vh last boss), this is my last gundrak run:

my last run here had Niley with 4.8-5.1k for past 3 days, thats quite an improvement.