Anyhting to do with lettuce, basil or other plants that slugs love, Vonny, I would strap the container with an adhesive copper tape.
Easy peasy...pull the paper off the back and stick it round the container, about four to six inches off the ground. Watch out for "paper cuts" when dealing with the copper tape, as the edges are quite sharp when being handled. Once it's stuck in place, it's fine.
Make sure the container surface is clean and dry whilst sticking it on.
You can probably find the product much cheaper on something like that favourite auction site.
Slugs hate copper, and will rarely cross it, if ever.
As far as toms are concerned, loads of manure or well rotted compost at the bottom, regular feeding with tomorite and good staking.
Personally, if garden space is limited, I find trailing cherry toms produce much more, in hanging baskets.
Herbs are usually Mediterranean plants that have evolved to thrive in harsh, hot climates, and are usually as tough as old boots.
Lavender hates wet roots and acid soil.
Rosemary thrives on neglect and the odd splosh of water now and then, as does Thyme and many others.
Most of them love heat and a good deal of sunshine.