When you run out of french tip guides the best alternative is to use a Cellphane tape for creating french tips.
Step 1: Stick the tape for your entire nail leaving the tip
Step 2: Swoop the polish on the tip. Don't worry even if it sticks to the tape.
Step 3: Once dry remove the tape. ~~~~Tadaaaaa ~~~~ :)
I have tried it and it's so easy-peasy :) :). We can use cellophane tape even in nail art but use it on plain nails but not on polished nails otherwise the glue of the tape will tamper the nail polish.