I just recently took shortsword to 70. I did it with rare shortsword at 95ql with nimble, coc, LT, mindstealer, and AD. rare Large Wood shield. Rare chainmail, rare great helm. Here's how I faired...
My stance - aggresive. Already have normal and defensive at 70+, aggresive it is.. I also want the faster swing timer to offset the lesser dmg per hit
My shortsword - I went with nimble as shortswords already deal less dmg and with an already fast swing timer I can make up for less dmg by ensuring I hit as often as I can. I have just over 50 body str so that also makes up for lesser dmg.
My Shield - went with large wood instead of metal or even another short sword. Why? I'm already a capable fighter, I wanted to truly test what I can do with the handicap a shortsword provides. Drake and my 70 skill in LMS just don't allow for it. So large wood shield and rare chainmail it was. I got my feedback and got to work on a new shield type for diversity in the field.
My Armor - Rare chainmail, 80ql+, all aosp (just didn't have access to web). I wanted feedback, anyone with a 2h axe or 2h maul and drake can pawn a troll... the real test is fighting an aged troll on foot with chainmail, wood shield, and a shortsword. Not everyone can do it. I was satisfied with my outcome.
Took me appr. 3 weeks in total, 1 week of just mucking about as i was offdeed, roughly 2 weeks of hunting on deli and cele to get 70+. Definately fun, learned I'm as decent as I hope I'd be. Once I get 70 in every weapon and shield type I'll be right where I want to be.
I could have done it in less then 2 weeks with drake, large metal shield or even an offhand shortsword. It's not hard. I recommend Accuracy enchants and setups over faster timers. Shortswords glanced, got parried, and just plain missed more then other weapons I found. I personally found more hits per second didn't equate to more dmg. Seemed like making each hit count was better.
I'd be curious to see what others found, I don't know anyone personally ingame that's skilled this weapon.