Warrior General Games

So I've been reading and have decided to build my LB with a normal soft cap focus. So my question is what abilities should get soft caps first? I'm thinking tackling > strength > agility?

It really depends on what position you want him to play in, mostly.

Any of these:
Major Skills – Strength, Agility, Stamina, Vision, Confidence, Tackling

I'd recommend agility first because it has very high value for all LB positions.

If you want to cap majors to make the most of Level bonuses - here is a route which lets you always intense train the one you are saving to cap with the one you will be capping next:

Vision - Agility - Speed - Tackling - Strength

By the time you've taken all those to at least the 1st cap, you'll be able to train confidence/stamina while you 2nd/3rd cap the rest, and then cap confidence/stamina around L40 +/- 5

Speed is not a major.