Bankroll management question?

This is a two part question.

First I have a 2.4k BR right now and trying to find a way to maximize my return.I also am trying to become a more well rounded player in poker.I am as of now am playing two table cash games at .50-1.00 tables with 75$ on each table 2 nights a week.I have thought about moving up to the 1$-2$ tables playing only 1 table or am I better off adding a third table at the lower level playing with 50$ on each table instead of 75$?

2) my next question I am also what to add playing sitngoes which level would be good for me to start off at I have not played many sitngoes I was thinking of starting out at 20$ range 2 tabling that as well..I do play MTT so I think i would be ok doing that or I was thinking again at a higher level like 30$-45$ range 1 table?

I think you get my point I just want to maximize my return without going broke with a bad run.I have bulit this BR from nothing mostly from MTTs but am starting to try to become more well rounded player..I have stuggled with these questions in my head for awhile and just thought it was time to get advice from the real poker players out here I am just a little fish in the shark tanks out there LOL

The amount you buyin for doesn't make nearly as much difference as the blinds for variance control. Most BRM guidelines seem to recommend 20-50 buyins, some say as much as 100 buyins (buyin being 100bbs) ...so, you're barely rolled for 100nl, if you dropped a few buyins would be time to drop to 50nl, may want to just increase tables at 50nl until you build a more comfortable BR for dropping $100 stacks at a time.

This is assuming you are a proven winner at these stakes online (if not, may want to drop lower until you've played significant # of hands first)...and if you are a winner, buy in fullstacked to maximize your edge.

Personally, I'd play $20-25 sngos if that was my game and I had $2400 online. Could get away with a little higher BRM-wise, but supposedly after that level the competition gets much tougher with pro grinders. The # of tables you play shouldn't make too much difference as to how many buyins to have in reserve if you have a positive ROI multitabling.

...btw, basically using common sense and repeating advice from those I'd take advice from.