Best post imp strategy for Huns in a 4man FFA?

I am a new player who struggles to keep up with their houses,economy and military at the same time. That is why ] huns are a blessing for me. My economy is actually really good for a player with my ELO(1200ish).

If I play with friends we play a 4 man FFA and most of the time one person gets wrecked by my castle rush, I sent like 8-10 heavy calvarey archers for a rush which succeeds. But once the game gets going I get smacked by another player with anti cavalry units(kills off my paladins and heavy archer army that I have in the imperial age).

Is there any other way to play with huns post imperial age. Please dont say choose another civilization because I really get housed alot because I am a new player I have a hard time with focussing on multipile areas of the map.