don't run FPI... you should allways have the entire script in one file... (don't shootplr either or runfpidefault=4)
Next, use 100 or greater, 50 means that the plr has to be breathing down his neck.
Again, preset the alphafade, don't constantly set it
:state=0:setalphafade=0,state=1
:state=1,plrdistwithin=100:setalphafade=100,state=2
:state=2:followplr
:state=2,plrdistwithin=100:state=3
:state=3,random=90:plraddhealth=-10,state=2
:state=3,random=60:plraddhealth=-5,state=2
:state=3,random=45:plraddhealth=-7,state=2
:state=3,random=30:plraddhealth=-3,state=2
Set as main, if enemy isn't invisible and still attacks, then enemys apearntly can't be invisible. If nothing happens, then there is a weird script bug somewhere...
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I believe society is flawed; our notions on life, on child rearing, stem too far back to be of relevance in this day and time.