How do you determine the best +EV play long term and keep your win rate consistant

Hey guys I was just wondering what you do to determine your win rate is consistant and maintain your monthly income from poker
(for those who are fortunate enough to be playing full time).

Do you stick to playing solid, always making the best play based on card equity
'So this would require rarely ever raising up medioker holdings from early/middle.
taking pots from fish/weak foes with semi bluffing/equity hands and waiting for the lags to pay you off in position while in the process minimising leaks.

Could this strategy with descipline and bankroll management make a profit long term? If so is it a case of increasingvolume for it to be effective as exploiting is harder...

do you need to be able to target players with a wide range on holdings to be above break even so potentially isolating bad players with rags etc.

All of the above 'first' paragraph I do effectively for the most part.
But where I Think I am struggling is keeping up with exploits while playing multi tables. Letting my cards and position define my game at times when maybe I should just accept bad variance will happen

( this all bearing in mind im on a touch latpop, with no HUD software, the most I can play is 4 tables.

Is there a best or any one most constructive way to grind with only 4 tables

I think to determine the best +EV play for consistent winning would be small balling pots that u can get away from on big river overbets/raises/shoves and then when u feel u have the best hand bet small on the river enducing your customer to raise.

I'm assuming your 4 tabling 6-max cash so in this case theres really no point of playing more than 60 or 70% of your stack unless u are Very confident your holding the best hand, this way u will minimize your chances of going bust

I would also try to never bluff with nothing, if your going to bluff the table ALWAYS TRY to be on some sort of draw.

Also just folding a lot, and punish the limpers with min raises pre and post flop.