If you are going 2-hander on the chosen, your group comp should be you, 2 dps, and 3 healers because two of the healers will be needed to maintain the rez cycle for you and your dps buddies.
If you insist on 2-hander, you should play a Black Orc. If you insist on 2-hander you should bring a SnB Chosen into the mix for Guard, KD, and survivability. 2+2+2 is a good mix for 6v6 but you're going to have a bad time with no real tank.
Just my opinion, and free advice is worth exactly what you pay for it, but 2H Chosen is least desirable spec in a 6-man at this time.
If you are dead set on playing a 2h Chosen, it is important that you realize the following;
1. On RoR, Crippling Strikes cannot trigger from AoE attacks (Blast Wave etc.) so it will only proc on melee attacks. This makes the tactic undesirable for any group play at any level. If you are able to find 1v1 duels then it may be worth it, but not for even a 6v6.
2. As a DPS Chosen, you will be starved for AP. Decent sustained damage with lackluster burst will be the best you can hope for. Without AP, you will be cannon fodder. Archmage drains are going to be the bane of your existence as you rush the squishy healers. To counter this, you will need to pick up and run the AP drain/refill aura. You should also run the Chaotic Advantage tactic for 75 AP on parry (every 3 secs). With these two items, you will still be AP challenged, so take the less than awesome Rank 1 Morale Inevitable Changing for some instant damage and instant refill of your AP bar.
3. You have a few anti-kite abilities in the spec below like Quake, Rening Blade and Dizzying Blow to stop a foe to catch up or keep them snared with a 10 second snare on a 5 second cool down, but with the plethora of CC, Punts, and snares in RoR, you will be constantly pre-kited and kited to death by Order ranged-heavy group compositions. Your best bet is to slot Unstoppable Juggernaut for a shorter CC/Snare break and hope for the best. I would not recommend using Renown points to augment this as you will need all of them in Deft Defender for Dodge and Disrupt as well as Reflexes for maxing out your Parry rate. Your survival rate is going to be helped by your heavy armor, but you will need as much Dodge, Disrupt, and Parry as possible to remain alive in RvR. If you are dead, your DPS = 0
4. Depending upon your gear, the abilities of your group healers, and your discipline not to over-extend out of heal range or LoS, you will probably want a mix of talismans in your gear in the following order of importance; Toughness>Strength>Armor. Your survival rate is going to be helped by your heavy armor, but you will need as much Toughness as possible (700 min) to mitigate the damage you will take by removing Block from a shield. The Strength is important to land punts, snares etc. You should have at least 500 Strength. Yes, you could go full glass-cannon forgetting Toughness and slotting all Strength, but you never go full retard. You will be dead before you can get to your target once the other 6-man discovers just how soft you are.
4.1 The discord line is probably a better choice for Quake and the additional Resists you get from the Discordant Instability aura with more points in this tree, but mainly because your main attack, Ravage, is Spirit damage and Discordant Instability debuffs the Spirit resists of your enemy, making Ravage hit harder. One could make an argument for the Path of Corruption because of the increase Toughness aura and the knockdown of Downfall; however, you will need as much anti-kite and mass stagger that Quake provides to be viable.
5. You are going to be very gear-dependent to be successful. You will need a lot of crit, even with the Oppressing Blows tactic giving you 15%. You will need a minimum of 22% crit to give you any meaningful Burst potential. The sad fact is that you will be a slave to the Random Number Generator (RNG) in this spec. Without some big crits, you will be less effective than a poorly played true melee DPS class. So find the best set and weapon you can and ensure you have a higher-than 22% crit rate. If you have to give up some renown points to achieve this, don't. It's better to use influence gear with +crit on it or a 5 piece set and influence gear to get to 22%+ crit. Remember, you need the renown for survivability. Once you have enough renown points to max Deft Defender for Dodge and Disrupt as well as Reflexes for Parry, you can increase your crit rate.
Here is a decent 2-hander spec. you can try.
RoR.builders - Chosen
I would advise you to consider the 2H Black Orc seriously before you commit to the frustration and lackluster dps performance of the current RoR version of the 2H Chosen.
