Each talent uses one of five upgrade categories (or experience tables), labeled A through E, to calculate how many experience points it costs a character to increase his or her prowess with the talent. Category A has the lowest costs, while category E is the most expensive.

Listed below are the costs for each category:

Talent	Experience Points Needed for Category
Prowess	A	B	C	D	E
0	--	2	2	3	4
1	--	4	6	7	9
2	--	6	9	12	15
3	--	8	13	17	21
4	--	11	17	22	28
5	--	14	21	27	34
6	8	17	25	33	41
7	10	19	29	39	48
8	11	22	34	45	55
9	13	25	38	50	65
10	14	28	43	55	70
11	16	32	47	65	80
12	17	35	51	70	85
13	19	38	55	75	95
14	21	41	60	85	105
15	22	45	65	90	110
16	24	48	70	95	120
17	26	51	75	105	130
18	27	55	80	110	135
19	--	58	85	115	145
20	--	62	95	125	155
21	--	--	--	130	165
22	--	--	--	140	170
23	--	--	--	145	180