hey umm. this is my first guide I like This Hero Since I played Last year. this hero Is A mighty killer if i say.
BUt to do it luna must be have a nice Item build up since she is like a Meal to a STR hero And A mighty Caster Like VS and So on...

So people will always try to make their opponent HP low By Using lucent beam in a while. but the better build for the skill is

1:bounce. 2:lunar blessing. 3:bounce. 4:lunar blessing.
the fifth is up to you if the opponent is no disabler you can go with the lunar blessing since it give more damage so the bounce will be slightly better. then the sixth. 6:bounce. 7:blessing. 8:Bounce. now That is the build up if you're playing safe or else try to farm to own your item faster.
then lvl 9-11:take lucent Beam. 12-13 take eclipse.
14:lucent. 15:Stats. 16:Eclipse 17~25:stats.

Some of you wont agree but it's cool. becouse i Almost Own The game Everytime. Just Note this You must go for last hit whenever you can. after got the must item "mask Of Death" try to go for pT The Go farm Like A Psyco. shock them afterwards with The Item You Had. if You Don't Want To o Farm at The Forest it's fine but You should get a TP If You Can.

item build up.
You Need Blood!!

:s alve: .
that is the item i always get first,2 salve will help if your opponent is like a pesky huskar or other.

Try To get The PT And Mask Of DominAtor As fast As You Can.
Then Go For A Lothar edge if The opponent is Like A Slow runner and no Disabler Coz It Will Taste damn Hurt For Luna, oR you can focus to get a butterfly.. Some Of My frienD call Me Nuts Becoz Of that but it's okay since I Always own The Game That Way,They Ask Why Go For Butterfly?
I Replied My Luna is A Damn farmers So I Will Stick To The damage Build Up and Butterfly Give evasion And Atk Speed As well, so Luna Can farm soo Quick.
The rest 3 item Is Depend on The Opponent.
If You Face Hero Like Slardar, Centaur And Some Stunner or disabler like that i say better go with a BKB and Try To upgrade Your Dominator To Satanic since you wont get stunned and the Friggin lifesteal You Shouldn't have a problem with it.

some Low HP and A Slow runner You Can Kill It quick just add another butterfly and a Etheral Blade. it will give some boost to your lucent beam and the etheral blade give pretty big damage as well and you can still go with your eclipse and all..

BUt if The Opponent Is A quick runner Then Go for Lothar edge and grab a Manta style. It will give You a Booooost Of speed and You can cast illusion And The Illusion Is very useful For confuse your stunner opponent that is targeting one like VS and alchemist and so on, but still if you face a AOE stunner better grab a BKB. One More Thing The illusion is Useful to attack A tower Since The aTtack still bounce to creep or you can attack creep and the attack still will damage the tower.