Best way ... maybe more like hardest way cause then you'd rely on several matches and let's say you make 5+ game acca - if even 1 match loses your bet is automatically screwed (dont count if all other selections win) ...
From this autumn i have started doing some fun accas on over 9.5 corners in any league/competion which has 5+ games starting at the same time ... As i usually place free bet on this "strategy" then i probably cant complain too much that after like 7-8 attempts i'm still waiting to hit one lol ...
I'd use single bets for that ^ though ... if i remember correctly then recently i turned two 5$ free bets in 888 into 200-300$ or so