I've always played that "bigger is better" in pit of war, so i ran a glad specifically to see if a tiny glad could have a chance specifically a theatrics, Landiss is this glad.

Original stats as a slave:

66 str 82 int 83 agil 87 stam, 55 size, 59 pres, 56 chi

Picked Dunger for race to balance the low str (probably would be better as a trug).

Current stats in gear + 2 achievements (250 hit points and 10 str) at level 50

146 str 99 int 123 agil 135 stam 55 size 105 pres, 78 chi 1781 hit points

Build:
Barreling attack 10, brute force 10, last stand 10
Feint 10, create distance 10, athleticism 10
Exotic weapons 10, signature move 10, Gratutous violence 10, Heavy Scarring 10

This build i personally believe is the perfect exotic weapon build with the current trees, it does take a rather large amount of trophies to pull off.

current record:
1327-965-56

I have found that having a smaller size on her has not really hindered her at all she has made as far as the top 3 in primus and is constantly in the top 10, has good success vs all 3 gladiator styles in the arena.

So in my opinion if you find a small warrior that has other stats you like go for it, it can work.