Kithlis

Though the first play-through has a learning curve, after a play or two most have a blast.
With many different avenues to earn Victory points, it is often a struggle for new players to know how to adjust to the cards they are seeing the first time they play. I have often found that players have an “Aha!” moment during the scoring at the end of their first game – the next several are usually much more enjoyable for them.
Starting a 7 player game with a lot of new people can take a long time, as everyone is adjusting and learning, so I would recommend introducing it to smaller groups first.

The variation on civilizations (A and B sides!), point strategies, and randomness of card shuffles makes the replay value high.

If playing with fewer than 5 people, it does seem that a supplemented Military strategy is the most effective, and Science nearly so. Though, when you play with more players, it spreads the card options out among more people and makes it harder for a single person to monopolize a strategy, making a diversified strategy just as or more effective than focusing on one.

Great fun with a table full of players!