Gotham Heights, and it's guides, are still popular so I decided to make one for those who still haven't found a setup they like. The problem with making a good Gotham Heights guide is that it's mainly a fast paced PvP capture map. You need to be able to counter build whatever your enemy is doing, and fit it into your team's Meta approach. If your team is squishy, you get to be tank, and their saving grace if you are in sync. If your team is meaty, you get to build DPS, and stack those kills as long as you know how to stay alive.
My mod pack for Doomsday is Bonus reflect on Suit of Sorrows and Prism, and Empowered Deathstroke's Claymore. Scaling Gold health and damage augments are what you want.
I purchase T3 Mace, and T1 Harness, or the flip if I am the tank at the start. You must head top to start the match. With any luck you can pick up 2+ kills and/or assists on the first clash. I personally live of early assists; they can set you up with enough credits to start making a large run.
My first main purchase is Lobo's Chain T3 (after selling the refundables). Most games I leave T4 to be picked up later in the game. After Lobo's, I build the reflect item that counter's the enemy's main damage source's. Once building that item up to at least T3 I look at investing in Claymore. I build it up to to T2 around this time when I can. You will definitely need a couple levels into your second reflect item around this time.
Often my build after I get to this satge looks like this: Lobo, Suit of Sorrows, Prism: 3 and Claymore 2. Max your main defense item first. lobo's second, secondary defense item 3rd and Claymore 4th. After this, I build right into Atomic Axe.
Once Axe gets capped (sometimes T1 if I am confident in my armor rend) I build one of the items from the optional list. It is your choice when it comes to want you think you should have as a kicker here. Any item will work here.
Remember, if you have any major stat acquistion slowdown, build into the refundables that have the stats you need/want.
The last point I shall make is if you want to aggressively take a turret, use charge to knock the weakest enemy off first. If you flank from the side opposite your team, they can use CC to keep them off the turret long enough for an easy kill. My personal favorite duo for taking a point from the enemy is Superman and Doomsday. The combination has 2 pushes, 1 root/slow, and at least 1 knock down oppurtunity (can get up to 4 or 5 depending on how the duo builds and skill timing).
I hope you liked this guide, and I apologize for the very long optional list. There is a lot of items which can be very effective on Doomsday, and I wanted to put a good pool out there for you guys to chose from to counter the enemy/assist your team.
Good luck, and have fun out there. And remember if you liked this guide, give it a thumbs up.