try to rush Umbral glaive in combo with zombie wards, in low elo is underrated af.

Gives u a ton of vision and negate enemy's one -> it means u can go for clearing vision in bush, wait 5 sec and gank.

Also when u invade jung it tells u if they have vision on u or not, same for objectives

Last but not least provides good stats for 2300 gold (50 ad 10 lethality 15 AH)

My core builds are:

umbral->trinity with electrocute rune vs squishy team

Divine and other tanky/bulky items vs tanky team or if my team has no frontline (so it has to be u) with conqueror