yeah took out supression at 35, its wasted there, pains not worth more than one either, engies can have seven skills on, two dont need to be maxed, or are practically useless after one, so thats five skills and about 2 points spared at 35 without shield, supression, protection or boom (all useless) - i put in boom coz it seemed to be the best of the lot

supression is good for combos and taking out the creeps, very useful, even essential on a map such as guardian, but totally wasted on the reactor boss, so kicked it