"Efficient Builds: Learn how to play here"
It simply translates to: "These strategies work for me, perhaps they can work for you." It's not like he's forcing it down anyone's throat.
Of course, the OP is obviously terrible with the Vasari.

Heh, heh, heh... The Vasari Dark Fleet strategy is not ridiculous. It takes work to accomplish and a player that knows what they are doing to survive with a fleet of frigates. Not many play the Vasari, it takes work.

I won't deny that the amount of ships that Dark Fleet provides is a little insane.
Don't waste you starting creds on crystal, it's not like your army needs it yet.
Vasari: First Cap Ship: Carrier or Battlecruiser (I prefer the carrier).
Your starting ship building should be this: 3 scouts (auto-scout), several skirmishers (until you have 6 capacity left), and a single colonizer to finish off your fleet capacity.
Spend your early researching getting the first four levels of the resource gathering skill. This requires a total of 3 imperial labs. (or is it 4 labs?). If you are on a map with lot's or ice/volcanic planets then you will likely want to hold off on the levels 3&4 of the resource gathering and get the volcanic/ice colonization. You'll want to work your way towards Return Armada (dark fleet). As soon as you get the dark fleet established you want to focus on boosting your fleet capacity as much as possible. The dark fleet will make your cap ships a burden to you, don't worry about losing them in battle.
Your warfare research if very simple. Tech up the repair skill (second in at the very bottom) as it will help heavy cruisers (enforcers) and standard frigates (Skirmishers). You will want the repair facility as well, it comes in handy in saving you money.
Ignore defenses... don't waste your money on them. Always keep an offensive fleet and a defensive fleet. The offensive fleet will protect the front lines until you actually go offensive. The defensive fleet will handle rebels and pirates, and guard while your offensive fleet is away. The only defenses you might need are the repair facilities, and possibly the anti-matter drain structure... and the planetary shields if your enemy builds a novalith.
Battle Strategy: Learn to focus fire. Target a specific ship and kill it, then move on to the next. Ignore cap ships (use bombers on them). Micromanage your ships' repair skill (they don't make good use of it themselves).
Advent:
Combat Strategy:Build Guardians and train their Repulsion skill.
Build Illuminators and train their special skill.
Build a fleet of Illuminators with plenty of guardians.
Take control of you guardians and activate repulsion.

Keep the enemies at bay while your illumators pick them off from out of enemies firing range.
*Repulsion is a fantastic way to keep the enemies away from your structures, or even to push the enemy away from their retreat zone.
*I love herding.