Need help in pulling

So my important question is that what level should I focus on gearing my characters? and how do I know what gears are good for them? my team is level 60 and they have like second tier non set gears but I wanna make them more better and effective, I need advice.

Also for gacha since hard pity is 120 which 6 star should I really focus on getting? cause I been saving since the first day and stopped for a while got busy in school but back again and had 25k+ currency for gacha I need help when should I pull 6 star or just pull randomly?

Alsooooooooo I need blueprint code for asia server cause Im kinda having a braindead learning the factories stuff tysm in adv.