Most people use the chins way but I got 99 range from fire giants. It's really all up to you.
yes. if you have good lvl archery
raise all there lvls about 10 lvls and the pupitars raise 15 lvls UPDATE: Actually, you can beat the elite four with all level 60's. Ive tried. And succeded.
just raise it to lvl 25
raise to lvl 35
raneg itself can not raise your cb lvl.But it cna raise hitpoints which raises your cb lvl.
Raise it up to lvl. 64
yes. Raise your pokemon's levels some more and it will be perfect. Also try to get Palkia from GTS or such.
rep quests
Battle monsters
Azeroth.
kill everything
by killing monsters