Probably something like this

Normally, I wouldn't translate 鎧袖一触 as 'Beat hands down' for Kaga's lines (even though it can translate as that), but it works really well with the rest of the joke.

Note: Tenryuu is hearing 鎧袖一触 as 外周一色 (same pronunciation) meaning something like 'All inside the circumference' or 'Single-coloured border' depending on which meaning of 一色 you want to take.