150% dominators is not hard
, 200% - really hard.
Also your need - experience game.
By March 3300 you must be 30000-35000cr (at the start trade), ship v=350-450 with forsazh.
1 year (maybe 2 or 3) you need trade (luxury) and protect from attacks Kellers of black hole. Spare parts sell on Science base.
Wait still rocketguns for sale (it will be when planet go for 4 level) and go to battle.
Start with 4 level (on planet
) just makes easier game, and only.
Dominators (red & green) dont attack your last 5-7 sistem (on 150% dominators), just Keller of black hole.
You need before BH at the time. You fly in BH, Keller out of hole. In hole you will wait normal ship. Kill it all, get Art (1/2/3/4/5 ship (who died last) - give different art).
After out, Keller fly on hole.
p.s. Sorry for inglish
p.p.s Look this save. You can see (to "find") rocketgun on start (write ракет).