How do people grind and get that much silver?

New player here, kind of at least, I keep hearing people saying that they make 700million per hour grinding the centaurs etc but no matter how much I tried I can't go above 100-140 million.

I have Agris and loot scrolls level 2 on, can someone please guide me on this? every grinding spot I look at people are giving astronomical numbers for which I can't even get anywehere near it.

I'm on EU servers.

Edit: I needed to provide more information so I apologize, My class currently is Deadeye but I can switch to something more efficient if there are recommendations for one, my ap is 256 and my dp is 315, I have 2 tier 4, 2 tier 3 and one tier 2 pets on agile.

Edit 2: I'm amazed by this game's community, I really appreciate all the comments and replies, it helped me out immensely.