The fact that you used the word "always" for a build shows really well that you don't understand how this game is working.

That was fun, but I guess the role of a tank has never been to be " a meat bag". You say "no CC full hp", which is fun to stack up but if you have no CC, well, you're just a ghost, nobody pays attention because only very very very new players will target you. Who is now in the meta the "worst" tank (win rate, draft...) it's Chen. Because he has no damn cc. Yes he is hard to kill, but him being around just makes his teammates priority targets with no cover. So,...

Is easy prey really usefull on bosses? I think they don't count as "mercenaries". In that case, maybe hungry bear is more usefull as it works on camps, and heroes, allowing more sustain, and saving your "mend pet" for important heals, and keeping a decent mana pool, I think boss are another kind, since they don't get the buff for "mercenary lord" or other things countings for mercs

Maybe I should take off the slow, the knockback should be enough to protect from ennemies chasing when you or a friend is escaping

I agree about everything in this build, except the first talent. Rabid Wolves allows you to heal more, yes, but not when you need it. I play Thrall a lot, I always heal myself between fights, either on enemy walls, minions, or even merc, and I never engage with less than 2 stacks of Frostwolf, so I think block help engaging but mostly escaping, after they dropped all they had and nearly kill you, Rab wolves heals more sure, but you usually engage with it, so it heals you for nothing, and...

I love the main idea ! :) Original and yet efficient in some comps. I'm just a bit dissapointed by "Hostile Takeover", I feel like it's not relevant with the whole idea But it's a super interesting character I, too, did a Goblin concept, about Dr Boom, don't hesitate to check it and give me some feedback :)

Just a little thing though : hitting automatically invisible heroes with your "a" is way too OP. It's not that it's very powerful, but it annihilates the utility of Zeratul, the poor guy could never get close without getting his face melted down by team. Nova is a really tricky hero to play 'cause of the positionning. You even take her off the possibility to place herself in danger 15 seconds is a bit long for the Ult move, but it seems to be balanced :)

Super interesting, and kinda well balanced, I think they will be hard to fit in the Nexus, but it's a well thought build

Althought I find your concept very interesting, it is really overpowered to me (even if it's logical when you create your own heroes). It's an assassin, with sustain via it's trait, great skills, dps, distance slow, but it's the talent breakdown causing him to be OP. ETC has the ability to gain 25% resistance to damage after his (a) level 13 I beleive, and you got the same talent level 1, for an assassin. Level 7 basic attack slow... It's overall unbalanced compared to other characters, but...