Originally Posted by Av3n
Earth-Fury I would suggest to add the negatives like this: -1, -2 etc.
Since I did had problems before with negative bonuses where a -hp (shouldn't happen since of the method you are using) or a -str bonus that is changed can kill a unit.
The negative bonuses are applied using a massive negative ability, which is added after
the positive abilities. In other words, that issue has already been solved.