How to optimize void best

New to Tft like 8 days in, I'm currently gold and I love void- more so the fact I really like kaisa was my first league main.

Im wondering what yall do when u hit 2* baron do u just save n keep rolling to get 3* baron or should we try to 3* AP kaisa cuz she does like 11k dmg easily I go void+rb+jewel gauntlet and on baron I'm going BT+ Rb +kraken/steraks.

Is it then worth to keep kog malz and reksai at that point or yall pivot to volibear, kindred and ornn at the cost of the void buffs? At void 9 all buffs go up by 100% so is it worth to sac that?