One way to do it is to change the amount of exp needed for those lvls.
Go to your gameserver folder data/static_data and open player_experience_table.xml
(Legend: <exp>Stacked Exp Amount</exp> <!-- Amount Needed for LVL -->)
Code:
<exp>0</exp> <!-- level 0 --> <!-- Experience is tallied up per level and stacks. -->
<exp>650</exp> <!-- 650 -->
<exp>2567</exp> <!-- 1917 -->
<exp>6797</exp> <!-- 4230 -->
<exp>15490</exp> <!-- 8693 -->
<exp>30073</exp> <!-- 14583 -->
<exp>52958</exp> <!-- 22885 -->
<exp>87894</exp> <!-- 34936 -->
<exp>140329</exp> <!-- 52435 -->
<exp>213454</exp> <!-- 73125 -->
<exp>307558</exp> <!-- 94104 --> <!-- Level 10 -->
<exp>438553</exp> <!-- 130995 -->
<exp>608161</exp> <!-- 169608 -->
<exp>825336</exp> <!-- 217175 -->
<exp>1091985</exp> <!-- 266649 -->
<exp>1418170</exp> <!-- 326185 -->
<exp>1810467</exp> <!-- 392297 -->
<exp>2332547</exp> <!-- 522080 -->
<exp>3002260</exp> <!-- 669713 -->
<exp>3820082</exp> <!-- 817822 -->
<exp>4820229</exp> <!-- 1000147 --> <!-- Level 20 -->
You'll have to change the stacking exp amounts according your exp rate.
1-6 1x Don't change anything
7-10 2x You'll have to divide Exp amount in <!-- XXX --> by 2 and add the value to 52958 (the previous <exp>XXX</exp> value)
So It would look like this
Code:
<exp>0</exp> <!-- level 0 --> <!-- Experience is tallied up per level and stacks. -->
<exp>650</exp> <!-- 650 -->
<exp>2567</exp> <!-- 1917 -->
<exp>6797</exp> <!-- 4230 -->
<exp>15490</exp> <!-- 8693 -->
<exp>30073</exp> <!-- 14583 -->
<exp>52958</exp> <!-- 22885 -->
<exp>70426</exp> <!-- 2x Starts 17468 -->
<exp>96643</exp> <!-- 26217 -->
<exp>133205</exp> <!-- 36562 -->
<exp>180257</exp> <!-- 47052 --> <!-- Level 10 -->
Hope you understood what I tried to explain.
