It is pretty much the same for both of them, though I find wargs as more difficult. Wargs typically require me to blow WotC and a pot to survive. Reavers tend to only need a single pot at most (except for very high ranks). I fair moderately well solo against wargs and reavers and I consider my lore-master around average for a Moors LM.
The short version can be summarized in 4 steps:
1) Use whatever skills are necessary at start to put down tar and BE slow
2) Use slows to stay out of range while you debuff appropriately
3) Alternate on different ends of the tar, when you pass in melee range, use your melee skills, once farther, dps from range and maintain debuffs/slows.
4) Stagger BF and various dps stuns to slow your target down further.
Slot eagle if you are 1v1 due to extra flanks (about 1k heal per flank, most fights tend to obtain 3-4 flanks). You'll want to have fast loader equipped and remember that your immediate stuns are storm-lore, BF & herb lore. You never use them for more than 1-2 seconds in a fight.
If the enemy has no brand then the fight is straightforward. I tend to let them fire first. So when they close to melee range, hit storm-lore. Use this temporary stun to fire off tar. Run to the far side as you fire off SoP:C followed by fire-lore. Next use BF followed by a BE. Use your staff melee skills as you pass through the slowed warg/reaver to the other side of the tar. Now fire off a sticky gourd, followed by a LotRD (if stun immunity is down), then put on another BE. Try to use sticky gourd hot spot as a pivot point over the tar, the opponent either passes through it to you and is damaged, or he wastes lots of time running around it to get to you. Once your next BF is up, use it. Try to stack 3 BE DoTs. I believe but don't know for certain that frost-lore is good to have up due to tactical damage reduction (reaver fire damage, warg shadow), windlore is also good for attack duration increase. If the opponent is really high ranked you may have to finish with lightning storm. Or if you are using the raven, then you probably have ents slotted instead of eagle, so you may have to use that as well. Tar+BE are lifesavers, and if for whatever reason you can't get them off, you're probably going to lose.
If branded then it is a crapshoot. It really depends on your crits and their rank. As far as you can put on SoP:C followed by fire-lore. Next use melee skills and try to get off a BE ASAP. If you can fire off tar, that is great, but many times with a brand it will be very hard to get that off. Your only hope at times is to fire off Call to Valar, then hit sticky tar, BE, and sticky gourd. Hopefully you can get all 3 off, then kite as much as you can while he is slowed, healing with your eagle flanks until his brand wears off. Without your stuns though, you are at a severe disadvantage.
If feasible, use call to valor first to fire off lightning. If the opponent is smart and he fears/disarms you, run until it wears off, hit a parable, and finish with lightning.
If you need Wisdom in a 1v1 your doing it wrong imo. I find it very easy to compete with high ranked reavers/wargs but it is essential you get your embers stacked all the way up and move around in your sticky gourd. For me personally I dont like using Ents against creeps because it is so powerful but if a warg comes at me in Flayer I will probably use it because Flayer is a pain to deal with. I would also strongly advise to not try and kite because you will most likely lose every time because when you kite you lose a great deal of dps. Work on movement and turning because you will need to do these successfully if you wish to get off your inductions without Call the Valar or Parables. Also I think Lightning is a big no no in 1v1s because the induction is way to long and the damage output isnt all that great.
Its pretty obvious that LM is probably the weakest of the freep tactical classes when you compare them to a Rk or Minstrel but LM is still a very strong class, it just takes a little bit more skill in dealing with the timing and inductions.