>>32661141

Raising an ability costs (current skill*2), with the first dot costing 1.

So 1, 2, 3, 4, 5

3, 2, 4, 6, 8

3, 5, 9, 15, 23.

To raise a (non favoured) ability to five is 23 XP.

If we start with an ability at 4 and an ability at 1:

Hitting five costs 8

2, 3, 4, 5

2, 4, 6, 8

2, 6, 12, 20.

So you have a total cost of 28. Which is bigger.

of course, I could be messing up the cost. It's been a while since I played, but I thought it was current score * multiple to increase, not target score.