Nothing much to say about this one. The 3rd lap on the game unlocks Special mode, giving you 15 upgrade bars to all your mechs, so shit gets crazy pretty fast.
With the previous 2 laps you should have between 12 and 15 million of cash to upgrade your units. Just fully upgrade Bellzelute and Granteed and watch Calvina and Touya completely destroy everything for the first 20 stages or so (just give the latter a Tesla Drive and a Booster to make up for its terrible attack ranges).
If anything, the only trophy that is a bit hard to unlock at first if the "Only One Crash" one, which requires you to deliver 100k damage or more to an enemy in a single battle. By the final stages this is a piece of cake even on bosses, as you just have to use an Armor Breaker, lower their morale to 50 and use a Maximum Break, involving either combination attacks or someone whose melee or shooting stat is fully upgraded.
Anyways, this was a pretty easy game to complete, save for some rough spots in EX-Hard. Now let's just hope the next OG game doesn't take another 4-5 years to appear. Honestly, I'm not really excited about the upoming SRW V given how many sprites they are going to recycle from the Z3 games, which were pretty terrible.