Its is possible to leveling from 80-260. below is my suggestion :
1: best is been leeching by other player till 250 took 1month with angel growth chest
exp buff , while attending holly battle field too. This all depend if you can 24/7 been
leeching and exp gain from sharing.
(This will save alot money/ hustle pimping and find item ..)
2: suggestion for leveling area :
(If you leveling solo by your self )[lvl 100-260]
80- 100 : league Farm (league rank 6)
{ Plant any seed that can be watering x5 per seed }
{ Seed buy in Angel Lyceum 1m each or kill boss 61++ until drop seed}
: 1bilion Exp voucher ( usually can be buy for 10m each or more cheap)
100-120 : Feather Leaf Forest ( Silversnow map)
110-130 : Goldhill ( Space Cowboy map )
: Samara Woods ( Sakura Festival map)
130-150 : Illusory Maze, Radiant Cave, ( Silversnow map)
: Edo City. ( Sakura Festival map)
: Sweet Orchard. ( Sequoia map )
150-170 : Iceberg Lake. ( Silversnow map)
: Agysical Tunnel ,Sunset Valley ( Space Cowboy map )
: Joy Festival ,Sakura Valley ( Sakura Festival )
170-190 : Subzero Market ( Silversnow map)
Desolate Ruins ( Space Cowboy map )
180-200 : Silver Wing Cable Car Station ( Silversnow map)
190-200 : Forbidden Sector ( Space Cowboy map )
: Shuwa Market. ( Shuwa map )
: Metal Scrapyard ( Sylvan Chaos map)
200-210 : Rusty Pipe Lane ( Sylvan Chaos map)
210-240 : Brilliant Boneyard ( Magma Flux map)
240-260 : Ivory Forest ( Magma Flux map)
: Starglow Path ( Arcana map)
: Dial Desert ( Aeternia map)
This the only suggestion that I think possible, if your stats and skill met the minimum requirements for each level, if cant survive at that Area just go below level suggest Area or lower expansion map . Example expansion Pharaoh lvl 90- 160, expansion Jurassic lvl 80- 160, expansion Oriental lvl 100-170,