While leveling you should be preparing your self for the future, not your build (as that will change). So:

1. While leveling, have one class skill from each class on your bars at all times. Classes level the slowest, so get them done now.
2. Have at least one weapon skill on your bar at all times
3. Have a flex or support skill you want to level at all times
4. Once the skill gets to the Morph stage, then put another one on the bar to level that rather than take the morph.

Your not going to have the best DPS now, but you will have the most flexibility later. You can apply this to both bars equally or some other way, but this is the best method while leveling 1 to 50. Reason, the game handicaps you right now to make you stronger than you really are. So, take advantage of that. You don't need the optimal skill load out, you need the optimal leveling load out.

Also, try to wear at least one of each weight of armor to get all those lines leveled.

Once you get up to or near 50, you should have all the skills that matter at Morph stage, your armors at 50 and most important, your classes at 50. Then, you can optimize your build.

One thing to remember, a lot of guides are written with idea to maximize production to the Nth Degree, which can make sense when your leveling your 8th character. But it can really suck the fun out of the game on your first character worrying about it.

Here is a better approach:

The beauty of the game now is each zone drops a Magic Set, a Stamina Set and a Health (Tanky) Set. You can do the content in the zone and get the gear you need with some nice bonuses to help your characters. It drops in at least Green and Blue is common once you get around the 30;s. A lot of times it drops in the Training trait, but you really don't need to have every single item in Training. Just prefer it as a trait, but wear what you get. When you are done in that zone move on to the next and start replacing the gear with the stuff from that zone. You can usually go about 10 levels over the gear before it starts to get noticeable as needing to be replaced. If you get something that is higher level than your wearing, just swap it out as you go along. Again, don't worry about the traits while leveling. The game is buffing you anyway.

As for leveling crafting, you should do that, but don't be in a hurry to invest all the skill points you need for it. You need those points for combat and defense. Just decon all the loot you have left over after selling to cover any repairs you do. Research Traits on items you think you are going to use. Then do the other traits later on.

Let me give you an example of what I did with my last two leveling characters.

1. I collected all the Skyshards in the zone. I avoided any and all quests other than those that show up in the delves that have skyshards. These quests do not give set items for rewards so no loss there.
2. I would farm the dolmens a few times to get set jewelry that helped my character
3. I would do the Public Dungeons including all the bosses
4. Then I would move to the next zone.

In doing this, I could fully gear up my character with level appropriate stuff, and it was helpful gear. May not have been the best, but you don't need the best while leveling. Any gear I farmed from Dolmens or PD's is repeatable, so I can get it at CP160 by just repeating. Then, I had all the content quests left for me once I reached CP160 as those can give you sweet Set Drops in good traits you want. And, Quest Experience is huge for gaining CPs once your past CP160. Kind of a waste before that.

In about 8 zones, I would be fully leveled in Mages, Fighters, Class, 3 Armors and Weapon Skills. Leaving only Undaunted to level, although I would get to almost 3 in that from Dungeon Achievements.