i tested some skill in test server,and some results subverted my cognition.The growth of skills are not smooth.
may the data below help u.
if u have any problem or question,post below
401 magical power
Poison spittle
dmg(from top to bottom,one to five levels)
476
499
526
553
580
conclusion:it not worth to lvl up the skill.if u just lvl it to lvl2,u lose 4 dmg
Healing
523
614
705
797
888
conclusion:it grow smoothly,and it is a lot of growth.
Sheild
dmg absorb
546
622
698
784
827
conclusion:u can find it grows smoothly before,and grows more when it lvl uo tp lvl4,but grows less in lvl5 suddenly.so it may a good idea lvl up it to 4.
above mentioned is basic skill,after testing ,i ll build my skill 12345 XD