POLL ~Starter Types

PLEASE HELP ME DECIDE WHICH TYPE TRIANGLE TO CHOOSE! ^{(no, they're not triforces!)}
Explanation:
Even if it doesn’t seem, I’m still active and at work. Since I decided to redesign them all, I’m finalizing my starters: as I said many times, my “games” are set in a greater region (AYLATH) which is in turn divided in three medium-sized regions (NORTH, CENTRE and SOUTH). Each region has its own trio of starters, with different types: classic GRASS/FIRE/WATER >> Centre, PSYCHIC/DARK/FIGHTING >> North and FLYING/ROCK/FIGHTING >> South.
However today I was researching perfect triangles and I realized that there are at least two more: FIRE/STEEL/ROCK and GRASS/POISON/GROUND! Both make a lot of sense elementally speaking and they also suit a lot the nature of respectively South and North region!

So here’s the Dilemma: my starters follow the pattern described on the right side of the picture above, they are already finalized and I like them a lot, but the combination of the GRASS/FIRE/WATER, GRASS/POISON/GROUND and FIRE/STEEL/ROCK –the left side of the picture- works so well with my “games“ that i'm seriously thinking about changing completely my plans.

Also, this latter combination has the advantage of having just 7 starter evolutionary lines (Fire and Grass lines are shared), while the first combination I designed has 8 lines, since only the Fighting line is shared. I dunno why, but a dex with less starter evolutionary lines seems more balanced to me. I really can’t decide, because I really love the Fakemon I already designed as my starters, but at the same time the other triangle combination is a lot practical :/
CAN YOU HELP ME DECIDE PLEASE? Give me your opinion!!