Imba citadel in slaugter mode?

I've just played 2vs2 pantheon game with 20 kills slaugher mode on Crucible. And game lasted 106 minutes where 40 minutes were just in their base. All they did was play rook and regulus bought hell of armor, citadel upgrades, building towers, placing mines and camping regeneration crystal. We had half inventory filled with artifacs yet it was almost next to impossible to kill em. We tried destroying citadel and hell it was even harder even with their portal captured! We got it to 40% hitpoints while dying 5 times in process and score was 14:18 for them. So we stopped and just run around map sold stuff and bought x4 critical weaps to be able to actually hurt em enough (rolling stones also stunned for enough time to regenerate all hps). It would be better if we had better chances against citadel they werent able to defend. It just hurted too much 500dmg/sec seemingly ignoring thousands of armor, instant kill for all creeps and hellish regeneration (probably due to upgrades). This game really suxxed. I plead to nerf citadel, since I don't see reason for it to be such big bad tower (slower attack would probably do).