I need tips

ok, I have an assassin and she sucks at dueling but I have given her good items, I need tips on dueling.

items:

1. 8/8/20 Gaze Um'd
2. 26 mara ammy
3. Um'd Shaft
4. 162 max dmg bartucs
5. 150 max dmg bartucs
6. Sigon gauntlets
7. Sigon boots
8. Corruption grip ring
9. 8% string of ears
10. Raven frost 18 dex

these are my problems when dueling a sorc... she teleports with TS and I cant click on her in time for me to do dragon flight, when I do click on her, the ts knocks me and it stops me from doing dragon flight, when I finally do it then it teleports to her and misses her when my asn attacks then I try to chase her and she teleports away. These are my res: Cold res is 75, fire res is 75, lightning res is 72 and poison res is 63. Can anyone gimme tips?