I figure out how to make Worm inflict ace damage, that was surprisingly easy...

Everything thanks to this code: _worm_impact = ["impact_30","impact_27"] call BIS_fnc_selectRandom; private _randomDamage = 1; private _bodyPart = ["head","body","arm_r","arm_l","leg_r","leg_l"] selectRandomWeighted [0.5,1,1,1,1,1]; [player, _randomDamage , _bodyPart, "vehiclecrash"] call ace_medical_fnc_addDamageToUnit;

Everything you need to do is copy and paste this in worm_attack.sqf and you done :D

In sqf file this should look like this: (That's only example don't use this!!!)

// by ALIAS

private ["_crater_impact"];

if (!hasInterface) exitWith {};

_head_worm = _this select 0;
_tail_worm = _this select 1;

enableCamShake true;
_worm_impact = ["impact_30","impact_27"] call BIS_fnc_selectRandom; private _randomDamage = 1; private _bodyPart = ["head","body","arm_r","arm_l","leg_r","leg_l"] selectRandomWeighted [0.5,1,1,1,1,1]; [player, _randomDamage , _bodyPart, "vehiclecrash"] call ace_medical_fnc_addDamageToUnit;
_head_worm say3D [_worm_impact, 500];