Experience Gain.

1 50
2 200
3 600
4 1.450
5 4.050
6 9.600
7 22.000
8 51.000
9 115.000
10 256.000
11 380.000
12 560.000
13 800.000
14 1.200.000
15 1.800.000
16 2.700.000
17 3.900.000
18 5.700.000
19 8.400.000
20 12.300.000
21 16.500.000
22 22.300.000
23 30.000.000
24 40.000.000
25 53.000.000
26 70.000.000
27 90.000.000
28 120.000.000
29 160.000.000
30 210.000.000
31 270.000.000
32 350.000.000
33 460.000.000
34 600.000.000
35 790.000.000
36 980.000.000
37 1.200.000.000
38 1.400.000.000
39 1.700.000.000
40 4.300.000.000
41 7.800.000.000
42 9.300.000.000
43 10.800.000.000
44 13.200.000.000
45 15.600.000.000
46 18.900.000.000
47 22.500.000.000
48 27.000.000.000
49 32.000.000.000
50 830.000.000.000

you can see that the experience significanty jumps up past 40.

The maximum exp I can get PER KILL is 35,000,000.

To go from 43 - 44: About 100 kills. Deep Purple kills.

Average time per kill = 34 seconds.

62s/kill
12s/ recovery between kills
12s/ run to/pull mob.
86s/kill
86x100 = 8600s IN A PERFECT WORLD.

143 minutes per level (If chain killing at a perfect rate)/

That's 2hr 23 mins for just 43-44. (about 5 trips to legion and back and I'm much slower than 86s/kill.)

So to hit 50 in a decent time (Seeing as you need 800billion)

That's 24,286 kills. coming in at 2,088,571s which is 34,809minutes, which is 580 hours, which is, 24 days.

Please up EXP rate post 40, or reduce required levels.

Alternate xp gains through gold nuggets give 3.000.000.000 xp for each nugget.

But there isnt that much to do at 50 anyway.