I wouldn't give slime strength. Slimes are basically all endurance, because they are so hard to harm. But being very liquid-like means no real strength.
For Dragonkin, I'd say +1 natural armor
Arachna +3 agility is way too much. Arachnas are big, no way they'll be agile. You could give them (and lamias) the poison ability (chance to reduce random enemy stat by 1 per hit or something similar) or webbing (basically natural slow ability, no mana required)
Drayad - since they are plant/tree like, I'd probably give them good STR and END, but low AGI. Slow and steady. Bonus on farm jobs, lumberjacking
Elves - I'd balance them better, give regular elves nature essence, with elves being mostly agi and magic based (drow might be more STR but less MAG)
Angels and Fairies get Flying, which is a great thing, but with proper weight penalties would be better balanced. The STR penalty of fairies would come into play, making them evasive, magic support, since they can't carry as much as angels, nor can they hit as hard in melee.
Angels... heal bonus or bonus on nurturing jobs (Nurse)?