Maybe on rich HL+U maps, you can build a Capitol (I usually don't play them), but it's better to take it from the enemy. And a market and a forge are unnecessary (buying 1 wood for 10 gems will leave you penniless)...
And skills shouldn't be chosen based on an either/or principle. They are usually not interchangeable; you need to choose based on the map (oh, how useful a scout can be on grass or at sea!), your troops and heroes, and the enemy's troops (how well skeletons fight under a Berserker!), and the artifacts you've obtained. You got Armageddon, picked up a lollipop - and go ahead and crush the enemy's Necromancers. And in this situation, how can you do without attack, shooting, and tactics?