Giggles is too underated around here, mainly stemming from the old 'OMG Pro is crap therefore anyone with Pro must be crap' mentality.
1) Pro is no longer crap now that we know how to Engineering rush. Pro crossbows and half cost castles are actually uber for treb rushing. Also if lacking Iron, you still get Vultures + trebs.
2) Giggles starts without fishing, and 2 amazing start techs - Agri and Wheel. IMO there is no better start combo than this as you can pick Pottery or AH depending on land / resources, and then Writing for your second tech to start building a half cost library. Occasionally you might need Mining first, but if you have a good food or cottage start Id go straight for Writing first to make the most of Cre with these starting techs.
3) So lets say you research AH first and can't find horses? Not a problem, lets try BW ... Wait what no copper too? Now what do we do, game over right? Nope, that means that Iron is in your BFC, and you are Pro. Use archers, slingshot Machinery / Engi, win the game.
4) 90
CH at priesthood. You don't need to wait for CoL to begin rapid expanding / conquering. Put up Ziggurats and Castles everywhere, your economy will be thankful.
No one is more versatile and adaptable as giggles is.