Beacause it is a small game and there isnt much to shoot at, I would be worried about warmachines (as some can fit under the limit) and the lack of a Look out Sir for a cold one mounted scar vet, also the lack of a BSB make stupidity slightly more undesirable
anyway, the suggested cold one build
Scar Vet, cold one, light armour, halberd Votff is 124 points and gives
2+ AS, and 4 strength 6 poison attacks
(movement is not important as he will be in the saurus block)
This on foot load out looks better
Scar Vet, Dragonhelm, Light Armour, Halberd, Votff, Luckstone and is 119 abd gives
3+ AS that is one time rerollable, 2+ ward against flaming and 4 strength 6 poison attacks
So infact is similarly equipped than the cold one build, no stupid and cheaper
In fact you could also fit in a GW if you wanted strength 7
I wouldnt ever take the potion of speed beacause VotFF is so much more useful