Need advice on lifting & cardio combinations

Hi all, playing rugby this season and would like some advice on which is the best combo for weights + cardio.

I would like to gain a few kg's (from 76-77 to 80+) over the next month or two as well, so keeping that in mind:

Routine 1 : Monday - Legs & core Tuesday - 30 - 40 mins Cycling before rugby training Wednesday - Upper body + core Thursday - 30 - 40 mins Cycling before rugby training Friday - Rest Saturday - game Sunday - rest/Mtbing

Routine 2: Monday: Legs & core + 15 mins HIIT cycling post workout Tuesday: Upper body + rugby training Wednesday: Legs & core + 15 mins HIIT cycling post workout Thursday: Upper body + rugby training Friday rest Saturday: game Sunday: rest/mtb/etc

Primarily lifting heavy with low reps on compound exercises with higher reps while performing isolations. Which of the two routines above would be best for overall fitness & strength gains for before and during the season?

Thanks guys!

edit: I am so so sorry about the formatting, wow