Learn from your past mistakes. Show conviction through experience. Know the rules of engagement* Adapt to your foe and exploit there weaknesses. Target prioritize. Charging the foe is easy. Knowing when to stop and turn back is a greater challenge. Show no mercy to or for favoritism. Know when to make sacrifices to achieve overall victory. Never totally rely on probability. Expect the unexpected. With this, the Art of War, any army is 'viable'. Limited only to the skill and method of its general. *Read your rulebook and your Codex often. Even if you think you know, I know that even the most veteran of players make mistakes (myself included). I know people who win tournaments because someone overlooked something and either they or there opponent never was called out on it. After all, your opponent isn't required to tell you if your wrong but unless it serves a purpose to improve there standings towards victory they most likely won't.
I agree with warlod. The army is as good as you are. If the basic list is weak you should exploid the rules to your fawor but this means you need to know the rules. I've been told stories of a storemanager who was chalanged to play with chaos dwarfs (wh40k amry) or something similar (these are miniatures that are not amongs the current armies) and it was told the the army list was not playable. The manager took the challenge, build and painted his army and won almost all matches. Everyone askes how he does that. He just replied that he had to learn all the other codexes along with the army one. So in simple terms. Know your enemy.
As long as you like it, you're on the right path. Eventually you'll have to make continuous tweaks thanks to the experience you get through playing with your army.
If you want to do dark angels go ravenwing/deathwing with Sammmael at the head with his movable plasma cannon and all those teleport homers for guiding your deathwimg into the right place
The best advice is always to ask someone who knows, ask interested store owners, ask other gamers in TT clubs, ask, ask, ask as for getting better at painting, thats mostly just reading about model preperation, paint thinning, using the right brush for the right effect, having a well lit private area to work and the one thing you cant avoid....PRACTISE
I stopped TT'ing about 10yrs ago, so I'm not going to go giving point army build advice when I'm not up to speed with current codex's etc lol
i dont even care if the Fist army is viable. Imperial Fists are AWESOME, Pedro Kantor is AWESOME, and having power fists EVERY CHANCE YOU GET? AWESOME!!! YOU BETTER DO IT! AND I WANT PICTURES! LOTS AND LOTS OF PICTURES! Welcome, fellow Son of Dorn. I salute you.
damn. well, make sure to include LOTS of wraith units. also, include wraithguard with axes AND a unit with swords! gotta have variation XD