I instruct/direct the combat program the US Army currently uses.
To the question of strength and technique: learning technique requires using less strength while teaching your body how to move. Once you get your technique down you can go ahead and apply strength to your motions. However, one thing should be pointed out here: you never want to adapt to a strength only style. In other words, it’s great to use more strength if you have it, but you must also train in a fashion where you are moving yourself around your opponent in lieu of strength. This makes you a more complete fighter. You will only do in combat what you do in training.
My thoughts are that in order to stay at your school and ramp up your training you have to find partners who are both willing to ramp up the strength level and are more evenly matched to your abilities.
BJJ is great for building the instinct to dominate the fight by position (which is key if your screenname is indicitive of your job) but, IMO, you need to incorporate some takedowns and standing clinches for a more complete method. Sambo is not the best answer here, but it is one answer.
Train on some knees, elbows and palm heels to round out your game and apply functionality to the real world. Basics, basics, basics - get real proficient in the basics and you’ll be badder than most.