"Orc" is the team I used to play in tournament (normally)... my opinion...
You should have:
4 Black Orcs
3 re-roll 1 fame
You need a troll and a gob, just for the one turn... the only way to score in one turn and (maybe... if you are lucky...) win the game or have a nil!...
Even without playing your troll, on the field he is already a threat for your opponent... a lot of really good players never give any skill to their troll! Just count the action of your troll as bonus and never play him as a central piece of your strategy... but the day he'll "mighty blows" 1 or 2 of your opponent players, you'll be happy! "Block" for the "double skill" could be a good idea as well... I would do it... don't forget that your opponents get a "double skill" at the same time than you...
One thrower for the "sure hand" skill and "block" for his add skill (the first one you should choose!)
The blitzers have already "block"! They don't really need more skills... maybe one with "guard", they move and dodge better than a Black Orc!
Three re-roll is already a lot (and you could as well win one more with "perfet coaching" for instance...)... 4 is definitly too much...
After that, give "guard" and/or "block" to your black orcs...
12 players in an orc team is enough when you are playing "Tr110"! Use your Gob just if you may need the one turn!
With that, you'll have a solid team! A Good and solid bashing team... what's the orcs are made for!
I'm looking forward to having a look at your team!