NOTE: Only your top three % count towards the next level.  So only work three spells for improvements while building.  It is a waste of your time to work more than three and you might even screw yourself up.
Spell/Skill % Chart
Drastically Further            71+%
Significantly Further        61-70%
Much Further                   46-60%
Some Further                   31-45%
Further                              16-30%
Little Further                       1-15%
Top line is int
Middle is total # of levels - number of schools level 2 or over(not  blink)
At right is % needed for next level.


e.g. your level 6 wc 5kran going for 6 qor and you have 50 int... 6+5+6-3=14, scrolling down the 50 int section to the number 14 we read % needed as 241, this is total between top 3 spells or skills in level 5

WC 5 only has archery, so to get level six you take the % given and multiply it by 1/3, this is also the case in some Jala levels, only there are 2 spells so you multiply by 2/3.

0    5    10    15    20     25    30   35   40   45    50  % needed
8    9    10    11    12     13    14   15   16   17    18     297
7    8     9     10    11     12    13   14   15   16   17      283
6    7     8      9     10     11    12   13   14   15   16      269
5    6     7      8      9      10    11   12   13   14   15      255
4    5     6      7      8       9     10   11   12   13   14      241
3    4     5      6      7       8      9    10   11   12   13      227
2    3     4      5      6       7      8     9    10   11   12      213
1    2     3      4      5       6      7     8     9    10   11      199
      1     2      3      4       5      6     7     8     9    10      185
             1      2      3       4      5     6     7     8     9       171
                     1      2       3      4     5     6     7     8       157
                             1       2      3     4     5     6     7       143
                                      1      2     3     4     5     6       129
                                              1     2     3     4     5       115 
                                                      1    2     3     4       101
                                                            1     2     3       87
                                                                    1    2       75(has been 73 on 1 char)
                                                                          1       75(has been 59 on 1 char)

Reverse chart for people who cant read above
Top line is int
At left is the level your going for
This chart assumes you go to 6 in all and do 1 school at a time till done it

level         int  0     5     10    15     20    25    30    35     40    45   50
first      2        199  185  171  157  143  129  115  101   87   75   75
school  3        213  199  185  171  157  143  129  115  101  87   75
            4        227  213  199  185  171  157  143  129  115  101  87
            5        241  227  213  199  185  171  157  143  129  115  101
            6        255  241  227  213  199  185  171  157  143  129  115
second 2        269  255  241  227  213  199  185  171  157  143  129
school  3        283  269  255  241  227  213  199  185  171  157  143
            4        297  283  269  255  241  227  213  199  185  171  157
            5                297  283  269  255  241  227  213  199  185  171
            6                        297  283  269  255  241  227  213  199  185
third    2                                297  283  269  255  241  227  213  199
school 3                                        297  283  269  255  241  227  213
           4                                                297  283  269  255  241  227
           5                                                        297  283  269  255  241
           6                                                                297  283  269  255
fourth 2                                                                        297  283  269
school 3                                                                                297  283