PURE TANKER VERSION.

I guess you have too much int at first. That's why you do low damage. My pally, lvl194, has 353vit already. I'm autoskill build, so I can do only 5k guardian, but I think that I might be able to do 8k if I wear special sword.

If you add more vit, you will be fine. All these are just my opinion. I'm still new too.

Well, you can't really expect much with what you have built in stats and with the resources you have.
If you want to boost your guardian you might want to understand how it works first.  This is my assumption on the guardian formula which might help you with it:  click here

You also need to know how ATK progresses with particular stats versus the weapon used.  
e.g. special sword get: 
2ATK per VIT
1.5ATK per DEX
1 ATK per STR

with your current stats, you might get more ATK by using a magic sword:
2.5ATK per INT
1ATK per DEX

I'm not sure why you use shield since you don't have shield mastery until Lv240.  You might want to use Idealsol for the meantime.

You should try to hit for Lv200, this is where you get Guardian Lv2 and is where you do more damage.  Keep Fortis up since it boosts damage also.  

Of course good gear will also provide significant impact on your performance, since a 5slot gear will trump your 3slot gear.  HP/VIT abilities and good Al Crystas will help improve your performance also.

ok ty for response,if 1 atk per str and 1.5 atk per dex why some of paladin (that focus on dmg)tends to use str while dex is better?magic sword?just bought it ,(dim sw vi)its good for atk and my guardian to some mob is 6k+,my mp get to 3k aswell but my hp decrease to 46k and after slotted w max hp+20%,its 48.8k,i can accept it even its bad,or have another better magic sw?im not using sinbad cos its useless when facing megas,and idk what boss element,should i buy sinbad?ive see lumikening stat(aspd-10% matk + (?))i dont need matk right?list me some magic sword ,ill try them,im using the brave shield bcos it have +5 vit (you know,im focusing on max hp only)ill try idealsol later,i cant understand with "5 slot gear will trump your 3 slot gear" could you explain it?abt the abis ill buy it once i finish mq,btw my ai crystas is all red one mdef+100,its awesome ^^fortis ?skill lv180?post spargas or elban?