i shield block the first and second attack the golem does then try to get in 2-3 hits then back to blocking with shield for another 1-2, sometimes the golem will do a third attack so just observe his 1-3 attack timings and go in after either his second or third attack with a mace. if you are low on stamina move away till you have max stamina again and again go in with a block 1-3 times then swing 1-2 times if you manage to parry him you might be able to get 3 attacks in. GL!