grind with EXP-Shrine and XP gained % in gear, magic orbs, runes, jewels, jewelery with extra XP helps
every game, walk to act 1 - open the map and check every shrine in cold plains, stony field and darkwood, in most cases you will find an EXP-Shrine in like 1 Minute
pro tip, run to k3k, enter the red portal, make a tp and then check for the EXP-Shrine and jump back in your tp from act 3, grind till it turns off and repeat
also try to find a game with more ppl, it will increase the xp, when you can kill fast enough in equal time, if not just run a solo game
because, when you cannot grind faster xp in a public game, then in a solo game, then its simply just not worth it
areas at this point are : TA, k3k and khalimgrad
grinding khalimgrad can be the fastest xp, because of the density, also TA, when you get the waypoint at left upper corner, its North West, grind through the lines down in the room, this way phalanx will not 1shot you, or even hit you
and right side to the next room and another round down last room and repeat, when you have a fast killing build