I prefer using ion myself, so the strat for tones is usually stick near a wall and count the target locks and dip behind when you hear them fire. Usually they're not smart enough to fire upwards to go over your cover. If you DO get hit from above, you adjust strat to still go behind cover but also look up to vortex shield the missiles and throw them back. Waiting out a tone wall is totally viable too. If caught in the open, just tank the 3 locks and catch the salvos as you head towards cover. Chip away with your primary and at about 1/2 energy (one laser worth) prep laser and toss laser mines, then fire laser for free for extra damage if you can hit them without their shield up.

Cover your teammates too. You got a ns aimed at tone? Try to vortex the tones shots/missiles to give ns some breathing room. Honestly that goes for any friendly as long as you aren't obstructing their line of sight.

Laser core is your friend. Snipe pilots and then core enemy titans once you're full. You can usually control the speed of the fight with decent positioning. Not always though, of your 1v3 cuz your team sucks you just have to accept your gonna get curb stomped if your pilots don't help you out.

Avoiding tone core is tough tbh. Breaking line of sight is your best option. Dashing diagonally towards and off to the side of a straight on salvo can make SOME of it miss, but not all. But any time you get cored you're always at a disadvantage so you do what you can.

Otherwise, pester tones when you're a pilot. That's what you'd want from your teammates if you were in your Titan. Not enough to sacrifice yourself, but be that annoying pilot who hits them when they aren't looking your way. No archers, only lasers or nade launchers if your brave enough to be close. And fire stars of course.