Is the speed of 2 1dc7.4 suitable for inverted fishing in black pits?

The line group should match the black pits with different fish conditions according to the fish conditions, and our line group matching should also be changed. We can't travel all over the country one line at a time. Where there are many big fish and the main attack is big things, I suggest using the main line 2.0~2.5 and the sub line 1.5. Both big and small fish have black holes. Choose the main line from 1.2 to 1.5 and the sub-line from 1.0 to 0.8. If the fish density is low and the individuals are not large in winter, it is suggested to adopt the main line of 0.8 ~ 1.0 and the secondary line of 0.3 ~ 0.4, focusing on our big crucian carp. Generally speaking, the No.2 hook has a reverse fishing line of 20-30 cm.