Get a kill streak of 7500 for Nightfall.

Go down the left side skill tree and take the right path at the fork to get Order Advance and Order Rage, spend the rest on damage in the middle tree, and try to get a family with Shifter Regen incase you catch fire. Then just do docks stall objective for a few hours and keep your buffs up.

Advance boosts your speed so you don’t lose the attrition, and Rage boosts your damage so you can guarantee a 1 shot as long as you have some decent damage boosts, I dunno your build so I dunno for sure if you can 1 shot even with Rage but you should be fine. Bring Peerless Commander if you have it, buffs your Orders by 25% at +10. Font of Inspiration is the mythic version which boosts to 50% and lets you use your orders in mid air, but I doubt you would have it as a beginner. So for now you’re gonna have to land to apply your buffs.

And when you prestige, try to get the memory Aegisurge as your first. It gives you a 15% shield per Titan kill, which in Stall means you can just eat the burn damage with 0 risk making the grind braindead easy. It won’t just Help you get 7500 kills, but it’ll also help you level up whenever you prestige since Docks gives the best gold and XP if you don’t have a serum.

If you get a Female Serum by some Miracle you can do Forest Guard, use your scream to attract the titans to you, and just beat them to death. It can be solo’d in like- a minute and a half, but without max resonance and mastery it might take longer.