If your playing arenas like RHCP, who have sucked since they lost Hillel but Flea is a phenomenal bassist who supports his bandmates rather than stomp all over them, then sure, you run whatever the hell you want. But when money is tight, a $50 SM 57 is gonna get that god of mud tone to the FOH just fine. If there is a phasing issue, do what they do in the studio, move the mic either forward or back until it goes away.
My EQ preferences are my own. If you want to disappear in a band setting, then by all means make that EQ smile. I used to set mine more like a wave leaning hard left, but EQ is in the ear of he who beholdin' the bass. What a bassist should really do is investigate what his guitarists are boosting and cutting and try to fill in the gaps rather than just try to be louder than everyone else in 'HIS' freq spectrum. But that means checking your ego at the door and working to make your band sound better, and who the hell wants to do that? You're up there to look and sound cool and to hell with those other guys, right?
To the OP, have you figured out that this is the worst place on the interwebs to ask for advice on anything pertaining to bass? If you really want to make sure you sound good, get out and go see some local bands. When you hear a dude or chic just killing it with a great tone, go up after the show and ask what they're running. Almost any bassist is more than willing to talk tech about their gear and give a new guy some pointers, but you better ask if they are a TB member first to avoid a bunch of snarky comments.
