The only use onslaught has is when we start a fight already at 100 gauge and will have to use 20 anyway to set up maim and storms eye. I believe making it cost free is the best way to go. As for shake it off, please replace it with something more useful. I dont see any real instance where itll be good to have. My personal suggestion is to switch it with the old pvp skill, thrill of war. This would be fantastic for the job since its only utility of slashing is shared among samurai and ninja already and it fits with its identity. Also block should give 20 gauge just like path. Not being able to do the highest potency combo to get more fell cleaves seem counter productive. Itll give us a choice of whether or not we want that heal from path or to keep doing the emnity combo. Lastly, fell cleave could use a potency increase compared to the other tanks, and if not, lower the cost of it or reduce the cd of inner release so it doesnt take so long to line them all up..