hi, and welcome to rad.

do you know something about the script editor? (or programming languages like c, c++ etc. )
if you want to implement something like towers or other static enemies its not really problematic to make them.

you can easily controll if youre character is near tho them with:  (controll of a flamethrower)

int proxi;
Quaternion orientation1;
Vector3 pos1, pos2, pos0, pos3, UpLoc;


   iObjectLocation(OBJ_xxx,  pos1); //obj_88 = tower
   iObjectLocation(OBJ_yyy ,pos2); //obj_22 = target
   iObjectLocation(OBJ_zzz  ,pos3); //flame ps

   pos0 = pos1-pos2;
   
proxi = iVectorLengthSq(pos0);      // returns range to target

     if (proxi < 300)                 //tower range
     {
        UpLoc = Vector3(0,1,0);
        iQuaternionLookAt(orientation1,pos2-pos3, UpLoc);
        iObjectOrientationSet(OBJ_zzz,orientation1);

       
         if (active == 0)
         {           
            active = 1;                  //return if the tower already got a target
            OUT_177 = IN_177+10;                         //tower dmg
         }
    }

     if ((proxi > 300)&&(active == 1))   
     {
        active = 0;
        OUT_177 = IN_177-10;
     }

hmm didn't tried or searched for one without a script because i like scripting more 

i think with a good loop its alot easier controlling a lot of towers (with god performance) and you need less event on proximity objects and things like that
(for games like wow i would prefer to make the dmg not with a projectile and event on collision object... in my opinion its better to
controll it with a timer (some seconds after projectile start) and chose than a chance to hit the player.)


but you are right, loop... it would be better if he begins with an easier game if he never used a programming language before.