A dagger needs 3 things: runspeed, survivability (evasion & HP/CP) and crit damage
TH has the most HP/CP, it has Dash and crit damage equal of the AW at pre-lvl 78, lowest evasion, lowest natural runspeed.
AW has the least HP/CP and the highest damage output at 78+, second highest evasion, second highest runspeed
PW has the middle amount of HP, highest natural runspeed and second highest damage at 78+,
So basically, AW has the highest damage, TH has the highest HP/CP, Plains Walker is the in the middle and it has the highest runspeed and evasion.
but as I read in an other forum:
"Well there are no facts on which of the daggers is better, only opinions.
If I'd say that it's a fact that Plains Walker is the best because it has a high survivability with 2nd highest damage, someone will come and say how great AW is because of the highest damage and hex. At which some point someone will come shouting out that an AW is a glass cannon and that TH is best because it has the highest amount of HP, dash and mirage. At which point both the pro-PW and pro-AW ppl will say that TH sucks because it has no Focus Death. etc etc."
thats all folks^^
but IMO in any cases as usual stuffs>buffs>skills