Just keep in mind that getting RA up and humming when you're playing online multiplayer is easier said than done, especially if you're on the wrong type of map for it. Also, your human opponents (unlike AI) will all be very aware of the Vasari's potential to go RA and they'll do what they can to prevent you from attaining RA. You'll also be vulnerable while you spend your resources building Imperial Labs and Phase Gates (dead give away to your opponents) and doing the research. Also, the Vasari's ships are relatively expensive, both in terms of credits, metal, and crystal and in terms of fleet supply points, so, IMHO, being able to get RA is the only reason to play Vasari. If you have to fight a competent TEC or Advent player early on you could get crushed. The risk can be high and the rewards can be great.