Ok, had 10 merits saved up before patch, so I dumped 3 into Savagery (I wanted to see what the base increased TP was) and 3 + 4 into Warrior's Charge.
Basically Warrior's Charge is a guaranteed Double attack everytime its used. It CAN be upgraded as much as 3 times (down to every 10mins), beyond that, Im not sure. It does stack with WSes as I tested with Steel Cyclone (gives 14TP with a single hit, 15 with 2) and would ALWAYS give 15TP if used before WS. Really nice to stack just about all the time with any WS.
Savagery is mainly why I'm making this topic, as the wording is a little confusing. Basically what this does is it acts as if your WSes have 10 more TP then they do when used under the affect of Warcry, kind of like a Martial weapon. So first upgrade is l+10TP, second is +20, third is +30. (not sure if a 4th/5th/6th is possible) I was kinda dissapointed that the first upgrade is actually only as strong as the following 2, making it kinda weak and really necessary to upgrade fully if at all. Its not all that bad though, when combined with Warrior's Mask, you got 45second chance to get 2 weapon skills possibly with +30 TP each, and this applies to everyone in the party of course.
Example: If I use Steel Cyclone at 150TP, and in addition I use Warcry before it, if I have 3 upgrades, Steel Cyclone will hit as if its @180TP, instead of 150TP. I tested this by using Spirits Within with and without Warcry on, and 100TP with Savagery did 177 w/1375 HP, the same as 110TP without Savagery.
I know nothing about Tomahawk, but if its as good as Angon, I probably will drop one of the above two for it, depending on how well it sticks on HNMs. Aggressive Aim just looks like shit, soo yeah, fuck that.