best way to lvl arks

wats your best way to lvl your arks???

im new to game and just wondered if theres a special spot on map to train arks or wether doin online missions is good?? 

advice much appreciated

Personally I farm on a spot near the end of the game, but so far only strategy I’ve found is find a good easy spot in the furthest part of the map you currently are and just keep farming same spot.  until I know of a better one, this is what I do this is for when your kinda far in the game but yeah early on OMs are good for lvling up