Hello. My opinion is HP and stamina are important. The str and dex part are so so, if the person has a proccing weapon go for some dex as at lower levels they may not be capped (unless heavily twinked). I am very anti-agility buffing. i just think its not worth it. Cha for enchanters is so so at best, if i recall it only matters in charm. Go ahead and ask the chanter if they want it if you feel like buffing.
For debuffs, at your level slow is all that matters at high level i use malos and slow, if the mob is a big named mob i might bust out cripple.