Just realized this was still ongoing and you were asking for information! I used Fortress Defense 2014 r3 with DF 40.24. I hope the data I have is applicable.
My current fort LeopardLens was begun in the year 250. Here is the embark screen:
So this fort is near Goblins, Ferric Elves, Greater Badgermen, Great Fiend Spiders, Jotunar, Humans, White Tigermen, Frogmen, and Warwolves. Pretty much as extensive a group as I could find.
The fort is now in its 36th year. It has experienced
43 separate sieges. The numbers of every siege are detailed in the following images:
One interesting thing noted during these fights were the usefulness of various animals brought. White Tigermen had a habit of bringing great numbers of horses and camels, even appearing mounted on them in three attacks. Yet in each attack, the animals fled wildly at the mere sight of a dwarf. Here is a picture and gif from siege #3, composed of 31 tigermen and 31 horses/camels, all mounted, and siege #7, composed of 36 tigermen and 37 horses/camels, with all tigermen mounted:
Siege #3, 255-10-04
Siege #7, 261-10-02
The mounted fights were both interesting and annoying, as while the mounts fled the tigermen were more than willing to fight. Which resulted in my dwarfs giving chase to pummel the mount, and having the tigermen take free shots at the dwarf as the mount ran all over the place.
If you would like any additional information concerning any of the sieges listed, I have detailed write-ups of each, pictures of the attacking force before engagement, animated gifs of every fight save some of the earlier ones, and pictures showing the aftermath. Just let me know and I will post what I have.