Tyrr has no benefit of DEX at all, it's not like the yull which armor mastery increases the skill crit rate by increasing DEX, so you go STR.
Obviously you can go +5 STR, +5 DEX, +4 CHA, but those are expensive ofc.
Also there is a CON build option, but that requires really end-game gear, including dragon or demon weapon to reach smth like 300k CP and 400k+ HP.